From 63ce7e4e92118fe2c1d4f4a3f38c595ea00b29da Mon Sep 17 00:00:00 2001
From: Vittorio Romeo <vittorio.romeo@outlook.com>
Date: Thu, 10 Feb 2022 17:19:01 +0000
Subject: [PATCH] Remove unnecessary includes from public-facing headers

---
 include/SFML/Audio/InputSoundFile.hpp          | 2 +-
 include/SFML/Audio/Music.hpp                   | 2 +-
 include/SFML/Audio/Sound.hpp                   | 2 +-
 include/SFML/Graphics/Drawable.hpp             | 2 +-
 include/SFML/Graphics/RenderTarget.hpp         | 2 +-
 include/SFML/Graphics/RenderWindow.hpp         | 1 -
 include/SFML/Graphics/Shape.hpp                | 2 ++
 include/SFML/Graphics/Text.hpp                 | 3 ++-
 include/SFML/Graphics/Texture.hpp              | 4 +++-
 include/SFML/Network/Ftp.hpp                   | 1 -
 include/SFML/System/Clock.hpp                  | 3 ++-
 include/SFML/System/Sleep.hpp                  | 3 ++-
 include/SFML/Window/Context.hpp                | 3 ++-
 include/SFML/Window/Sensor.hpp                 | 1 -
 include/SFML/Window/Vulkan.hpp                 | 1 -
 include/SFML/Window/Window.hpp                 | 1 +
 src/SFML/Audio/InputSoundFile.cpp              | 1 +
 src/SFML/Audio/Music.cpp                       | 1 +
 src/SFML/Audio/SoundBuffer.cpp                 | 1 +
 src/SFML/Graphics/Font.cpp                     | 1 +
 src/SFML/Graphics/RenderTextureImplDefault.cpp | 1 +
 src/SFML/Graphics/RenderTextureImplFBO.cpp     | 1 +
 src/SFML/Graphics/Text.cpp                     | 1 +
 src/SFML/Main/MainAndroid.cpp                  | 1 +
 src/SFML/System/Clock.cpp                      | 1 +
 src/SFML/System/Sleep.cpp                      | 1 +
 src/SFML/System/Unix/SleepImpl.cpp             | 1 +
 src/SFML/System/Unix/SleepImpl.hpp             | 3 ++-
 src/SFML/System/Win32/SleepImpl.cpp            | 1 +
 src/SFML/System/Win32/SleepImpl.hpp            | 3 ++-
 src/SFML/Window/Unix/ClipboardImpl.cpp         | 1 +
 src/SFML/Window/Unix/WindowImplX11.cpp         | 1 +
 src/SFML/Window/Win32/JoystickImpl.cpp         | 1 +
 src/SFML/Window/WindowImpl.cpp                 | 1 +
 src/SFML/Window/iOS/EaglContext.mm             | 1 +
 test/System/Clock.cpp                          | 1 +
 36 files changed, 41 insertions(+), 16 deletions(-)

diff --git a/include/SFML/Audio/InputSoundFile.hpp b/include/SFML/Audio/InputSoundFile.hpp
index f010258eb..7d13131d2 100644
--- a/include/SFML/Audio/InputSoundFile.hpp
+++ b/include/SFML/Audio/InputSoundFile.hpp
@@ -29,7 +29,6 @@
 // Headers
 ////////////////////////////////////////////////////////////
 #include <SFML/Audio/Export.hpp>
-#include <SFML/System/Time.hpp>
 #include <memory>
 #include <string>
 #include <cstddef>
@@ -37,6 +36,7 @@
 
 namespace sf
 {
+class Time;
 class InputStream;
 class SoundFileReader;
 
diff --git a/include/SFML/Audio/Music.hpp b/include/SFML/Audio/Music.hpp
index 32ed5f5f7..64cc25fef 100644
--- a/include/SFML/Audio/Music.hpp
+++ b/include/SFML/Audio/Music.hpp
@@ -31,13 +31,13 @@
 #include <SFML/Audio/Export.hpp>
 #include <SFML/Audio/SoundStream.hpp>
 #include <SFML/Audio/InputSoundFile.hpp>
-#include <SFML/System/Time.hpp>
 #include <string>
 #include <vector>
 
 
 namespace sf
 {
+class Time;
 class InputStream;
 
 ////////////////////////////////////////////////////////////
diff --git a/include/SFML/Audio/Sound.hpp b/include/SFML/Audio/Sound.hpp
index b47483ae9..7424acf07 100644
--- a/include/SFML/Audio/Sound.hpp
+++ b/include/SFML/Audio/Sound.hpp
@@ -30,12 +30,12 @@
 ////////////////////////////////////////////////////////////
 #include <SFML/Audio/Export.hpp>
 #include <SFML/Audio/SoundSource.hpp>
-#include <SFML/System/Time.hpp>
 #include <cstdlib>
 
 
 namespace sf
 {
+class Time;
 class SoundBuffer;
 
 ////////////////////////////////////////////////////////////
diff --git a/include/SFML/Graphics/Drawable.hpp b/include/SFML/Graphics/Drawable.hpp
index 49a005f02..1ebcfbb91 100644
--- a/include/SFML/Graphics/Drawable.hpp
+++ b/include/SFML/Graphics/Drawable.hpp
@@ -29,12 +29,12 @@
 // Headers
 ////////////////////////////////////////////////////////////
 #include <SFML/Graphics/Export.hpp>
-#include <SFML/Graphics/RenderStates.hpp>
 
 
 namespace sf
 {
 class RenderTarget;
+class RenderStates;
 
 ////////////////////////////////////////////////////////////
 /// \brief Abstract base class for objects that can be drawn
diff --git a/include/SFML/Graphics/RenderTarget.hpp b/include/SFML/Graphics/RenderTarget.hpp
index 95a874b4f..47a565279 100644
--- a/include/SFML/Graphics/RenderTarget.hpp
+++ b/include/SFML/Graphics/RenderTarget.hpp
@@ -32,7 +32,6 @@
 #include <SFML/Graphics/Color.hpp>
 #include <SFML/Graphics/Rect.hpp>
 #include <SFML/Graphics/View.hpp>
-#include <SFML/Graphics/Transform.hpp>
 #include <SFML/Graphics/BlendMode.hpp>
 #include <SFML/Graphics/RenderStates.hpp>
 #include <SFML/Graphics/PrimitiveType.hpp>
@@ -44,6 +43,7 @@ namespace sf
 {
 class Drawable;
 class VertexBuffer;
+class Transform;
 
 ////////////////////////////////////////////////////////////
 /// \brief Base class for all render targets (window, texture, ...)
diff --git a/include/SFML/Graphics/RenderWindow.hpp b/include/SFML/Graphics/RenderWindow.hpp
index 3fc6c543d..b278c3764 100644
--- a/include/SFML/Graphics/RenderWindow.hpp
+++ b/include/SFML/Graphics/RenderWindow.hpp
@@ -30,7 +30,6 @@
 ////////////////////////////////////////////////////////////
 #include <SFML/Graphics/Export.hpp>
 #include <SFML/Graphics/RenderTarget.hpp>
-#include <SFML/Graphics/Image.hpp>
 #include <SFML/Window/Window.hpp>
 
 
diff --git a/include/SFML/Graphics/Shape.hpp b/include/SFML/Graphics/Shape.hpp
index 6ae93e1c8..b2434ef85 100644
--- a/include/SFML/Graphics/Shape.hpp
+++ b/include/SFML/Graphics/Shape.hpp
@@ -37,6 +37,8 @@
 
 namespace sf
 {
+class Texture;
+
 ////////////////////////////////////////////////////////////
 /// \brief Base class for textured shapes with outline
 ///
diff --git a/include/SFML/Graphics/Text.hpp b/include/SFML/Graphics/Text.hpp
index a36a1acb6..0d9228d56 100644
--- a/include/SFML/Graphics/Text.hpp
+++ b/include/SFML/Graphics/Text.hpp
@@ -31,7 +31,6 @@
 #include <SFML/Graphics/Export.hpp>
 #include <SFML/Graphics/Drawable.hpp>
 #include <SFML/Graphics/Transformable.hpp>
-#include <SFML/Graphics/Font.hpp>
 #include <SFML/Graphics/Rect.hpp>
 #include <SFML/Graphics/VertexArray.hpp>
 #include <SFML/System/String.hpp>
@@ -41,6 +40,8 @@
 
 namespace sf
 {
+class Font;
+
 ////////////////////////////////////////////////////////////
 /// \brief Graphical text that can be drawn to a render target
 ///
diff --git a/include/SFML/Graphics/Texture.hpp b/include/SFML/Graphics/Texture.hpp
index 7f4e33e36..171809853 100644
--- a/include/SFML/Graphics/Texture.hpp
+++ b/include/SFML/Graphics/Texture.hpp
@@ -29,8 +29,9 @@
 // Headers
 ////////////////////////////////////////////////////////////
 #include <SFML/Graphics/Export.hpp>
-#include <SFML/Graphics/Image.hpp>
 #include <SFML/Window/GlResource.hpp>
+#include <SFML/Graphics/Rect.hpp>
+#include <string>
 
 
 namespace sf
@@ -40,6 +41,7 @@ class RenderTarget;
 class RenderTexture;
 class Text;
 class Window;
+class Image;
 
 ////////////////////////////////////////////////////////////
 /// \brief Image living on the graphics card that can be used for drawing
diff --git a/include/SFML/Network/Ftp.hpp b/include/SFML/Network/Ftp.hpp
index db9489268..520e18fde 100644
--- a/include/SFML/Network/Ftp.hpp
+++ b/include/SFML/Network/Ftp.hpp
@@ -30,7 +30,6 @@
 ////////////////////////////////////////////////////////////
 #include <SFML/Network/Export.hpp>
 #include <SFML/Network/TcpSocket.hpp>
-
 #include <SFML/System/Time.hpp>
 #include <string>
 #include <vector>
diff --git a/include/SFML/System/Clock.hpp b/include/SFML/System/Clock.hpp
index 0ee4d9dc0..21a9c38ca 100644
--- a/include/SFML/System/Clock.hpp
+++ b/include/SFML/System/Clock.hpp
@@ -29,7 +29,6 @@
 // Headers
 ////////////////////////////////////////////////////////////
 #include <SFML/System/Export.hpp>
-#include <SFML/System/Time.hpp>
 #include <chrono>
 #include <ratio>
 #include <type_traits>
@@ -80,6 +79,8 @@ namespace priv
 
 } // namespace priv
 
+class Time;
+
 ////////////////////////////////////////////////////////////
 /// \brief Utility class that measures the elapsed time
 ///
diff --git a/include/SFML/System/Sleep.hpp b/include/SFML/System/Sleep.hpp
index 9362e47f3..c8b74d748 100644
--- a/include/SFML/System/Sleep.hpp
+++ b/include/SFML/System/Sleep.hpp
@@ -29,11 +29,12 @@
 // Headers
 ////////////////////////////////////////////////////////////
 #include <SFML/System/Export.hpp>
-#include <SFML/System/Time.hpp>
 
 
 namespace sf
 {
+class Time;
+
 ////////////////////////////////////////////////////////////
 /// \ingroup system
 /// \brief Make the current thread sleep for a given duration
diff --git a/include/SFML/Window/Context.hpp b/include/SFML/Window/Context.hpp
index 73f1fb869..21aae7117 100644
--- a/include/SFML/Window/Context.hpp
+++ b/include/SFML/Window/Context.hpp
@@ -30,7 +30,6 @@
 ////////////////////////////////////////////////////////////
 #include <SFML/Window/Export.hpp>
 #include <SFML/Window/GlResource.hpp>
-#include <SFML/Window/ContextSettings.hpp>
 #include <memory>
 
 
@@ -41,6 +40,8 @@ namespace priv
     class GlContext;
 }
 
+struct ContextSettings;
+
 using GlFunctionPointer = void (*)();
 
 ////////////////////////////////////////////////////////////
diff --git a/include/SFML/Window/Sensor.hpp b/include/SFML/Window/Sensor.hpp
index 98652d29f..747a57211 100644
--- a/include/SFML/Window/Sensor.hpp
+++ b/include/SFML/Window/Sensor.hpp
@@ -30,7 +30,6 @@
 ////////////////////////////////////////////////////////////
 #include <SFML/Window/Export.hpp>
 #include <SFML/System/Vector3.hpp>
-#include <SFML/System/Time.hpp>
 
 
 namespace sf
diff --git a/include/SFML/Window/Vulkan.hpp b/include/SFML/Window/Vulkan.hpp
index 5a0927a6e..0acf0a364 100644
--- a/include/SFML/Window/Vulkan.hpp
+++ b/include/SFML/Window/Vulkan.hpp
@@ -29,7 +29,6 @@
 // Headers
 ////////////////////////////////////////////////////////////
 #include <SFML/Window/Export.hpp>
-#include <SFML/Window/WindowHandle.hpp>
 #include <vector>
 #include <cstdint>
 
diff --git a/include/SFML/Window/Window.hpp b/include/SFML/Window/Window.hpp
index d29442e19..0192a1d69 100644
--- a/include/SFML/Window/Window.hpp
+++ b/include/SFML/Window/Window.hpp
@@ -31,6 +31,7 @@
 #include <SFML/Window/ContextSettings.hpp>
 #include <SFML/Window/GlResource.hpp>
 #include <SFML/Window/WindowBase.hpp>
+#include <SFML/System/Time.hpp>
 #include <memory>
 
 
diff --git a/src/SFML/Audio/InputSoundFile.cpp b/src/SFML/Audio/InputSoundFile.cpp
index ddf7d9c85..83cfabab9 100644
--- a/src/SFML/Audio/InputSoundFile.cpp
+++ b/src/SFML/Audio/InputSoundFile.cpp
@@ -32,6 +32,7 @@
 #include <SFML/System/FileInputStream.hpp>
 #include <SFML/System/MemoryInputStream.hpp>
 #include <SFML/System/Err.hpp>
+#include <SFML/System/Time.hpp>
 #include <iostream>
 #include <algorithm>
 
diff --git a/src/SFML/Audio/Music.cpp b/src/SFML/Audio/Music.cpp
index 9b5a190ca..ef5ba31ea 100644
--- a/src/SFML/Audio/Music.cpp
+++ b/src/SFML/Audio/Music.cpp
@@ -28,6 +28,7 @@
 #include <SFML/Audio/Music.hpp>
 #include <SFML/Audio/ALCheck.hpp>
 #include <SFML/System/Err.hpp>
+#include <SFML/System/Time.hpp>
 #include <fstream>
 #include <algorithm>
 #include <mutex>
diff --git a/src/SFML/Audio/SoundBuffer.cpp b/src/SFML/Audio/SoundBuffer.cpp
index 240771863..ecc58320a 100644
--- a/src/SFML/Audio/SoundBuffer.cpp
+++ b/src/SFML/Audio/SoundBuffer.cpp
@@ -32,6 +32,7 @@
 #include <SFML/Audio/AudioDevice.hpp>
 #include <SFML/Audio/ALCheck.hpp>
 #include <SFML/System/Err.hpp>
+#include <SFML/System/Time.hpp>
 #include <memory>
 
 #if defined(__APPLE__)
diff --git a/src/SFML/Graphics/Font.cpp b/src/SFML/Graphics/Font.cpp
index f0b8461dc..993c140ce 100644
--- a/src/SFML/Graphics/Font.cpp
+++ b/src/SFML/Graphics/Font.cpp
@@ -27,6 +27,7 @@
 ////////////////////////////////////////////////////////////
 #include <SFML/Graphics/Font.hpp>
 #include <SFML/Graphics/GLCheck.hpp>
+#include <SFML/Graphics/Image.hpp>
 #ifdef SFML_SYSTEM_ANDROID
     #include <SFML/System/Android/ResourceStream.hpp>
 #endif
diff --git a/src/SFML/Graphics/RenderTextureImplDefault.cpp b/src/SFML/Graphics/RenderTextureImplDefault.cpp
index ca094ab90..c63d3c892 100644
--- a/src/SFML/Graphics/RenderTextureImplDefault.cpp
+++ b/src/SFML/Graphics/RenderTextureImplDefault.cpp
@@ -29,6 +29,7 @@
 #include <SFML/Graphics/GLCheck.hpp>
 #include <SFML/Graphics/TextureSaver.hpp>
 #include <SFML/Window/Context.hpp>
+#include <SFML/Window/ContextSettings.hpp>
 #include <memory>
 
 
diff --git a/src/SFML/Graphics/RenderTextureImplFBO.cpp b/src/SFML/Graphics/RenderTextureImplFBO.cpp
index 1fca17eb9..cefbe4bac 100644
--- a/src/SFML/Graphics/RenderTextureImplFBO.cpp
+++ b/src/SFML/Graphics/RenderTextureImplFBO.cpp
@@ -29,6 +29,7 @@
 #include <SFML/Graphics/Texture.hpp>
 #include <SFML/Graphics/GLCheck.hpp>
 #include <SFML/Window/Context.hpp>
+#include <SFML/Window/ContextSettings.hpp>
 #include <SFML/System/Err.hpp>
 #include <mutex>
 #include <set>
diff --git a/src/SFML/Graphics/Text.cpp b/src/SFML/Graphics/Text.cpp
index 374a1eb1e..57355c595 100644
--- a/src/SFML/Graphics/Text.cpp
+++ b/src/SFML/Graphics/Text.cpp
@@ -28,6 +28,7 @@
 #include <SFML/Graphics/Text.hpp>
 #include <SFML/Graphics/Texture.hpp>
 #include <SFML/Graphics/RenderTarget.hpp>
+#include <SFML/Graphics/Font.hpp>
 #include <algorithm>
 #include <cmath>
 
diff --git a/src/SFML/Main/MainAndroid.cpp b/src/SFML/Main/MainAndroid.cpp
index 5a6be3c8b..5e5d03547 100644
--- a/src/SFML/Main/MainAndroid.cpp
+++ b/src/SFML/Main/MainAndroid.cpp
@@ -41,6 +41,7 @@
 #include <SFML/System/Android/Activity.hpp>
 #include <SFML/System/Sleep.hpp>
 #include <SFML/System/Err.hpp>
+#include <SFML/System/Time.hpp>
 #include <android/window.h>
 #include <android/native_activity.h>
 #include <cstring>
diff --git a/src/SFML/System/Clock.cpp b/src/SFML/System/Clock.cpp
index 2abf85dfe..f9c0ea5a3 100644
--- a/src/SFML/System/Clock.cpp
+++ b/src/SFML/System/Clock.cpp
@@ -26,6 +26,7 @@
 // Headers
 ////////////////////////////////////////////////////////////
 #include <SFML/System/Clock.hpp>
+#include <SFML/System/Time.hpp>
 
 
 namespace sf
diff --git a/src/SFML/System/Sleep.cpp b/src/SFML/System/Sleep.cpp
index ee4c73050..bc0522311 100644
--- a/src/SFML/System/Sleep.cpp
+++ b/src/SFML/System/Sleep.cpp
@@ -26,6 +26,7 @@
 // Headers
 ////////////////////////////////////////////////////////////
 #include <SFML/System/Sleep.hpp>
+#include <SFML/System/Time.hpp>
 
 #if defined(SFML_SYSTEM_WINDOWS)
     #include <SFML/System/Win32/SleepImpl.hpp>
diff --git a/src/SFML/System/Unix/SleepImpl.cpp b/src/SFML/System/Unix/SleepImpl.cpp
index ef35dbdea..599a448dd 100644
--- a/src/SFML/System/Unix/SleepImpl.cpp
+++ b/src/SFML/System/Unix/SleepImpl.cpp
@@ -26,6 +26,7 @@
 // Headers
 ////////////////////////////////////////////////////////////
 #include <SFML/System/Unix/SleepImpl.hpp>
+#include <SFML/System/Time.hpp>
 #include <cerrno>
 #include <ctime>
 
diff --git a/src/SFML/System/Unix/SleepImpl.hpp b/src/SFML/System/Unix/SleepImpl.hpp
index 5731ad376..dbaff3741 100644
--- a/src/SFML/System/Unix/SleepImpl.hpp
+++ b/src/SFML/System/Unix/SleepImpl.hpp
@@ -29,9 +29,10 @@
 // Headers
 ////////////////////////////////////////////////////////////
 #include <SFML/Config.hpp>
-#include <SFML/System/Time.hpp>
 
 
+namespace sf { class Time; }
+
 namespace sf::priv
 {
 ////////////////////////////////////////////////////////////
diff --git a/src/SFML/System/Win32/SleepImpl.cpp b/src/SFML/System/Win32/SleepImpl.cpp
index b44364056..8207d48f4 100644
--- a/src/SFML/System/Win32/SleepImpl.cpp
+++ b/src/SFML/System/Win32/SleepImpl.cpp
@@ -27,6 +27,7 @@
 ////////////////////////////////////////////////////////////
 #include <SFML/System/Win32/SleepImpl.hpp>
 #include <SFML/System/Win32/WindowsHeader.hpp>
+#include <SFML/System/Time.hpp>
 #include <mmsystem.h>
 
 namespace sf::priv
diff --git a/src/SFML/System/Win32/SleepImpl.hpp b/src/SFML/System/Win32/SleepImpl.hpp
index 10f37ac71..4ab282830 100644
--- a/src/SFML/System/Win32/SleepImpl.hpp
+++ b/src/SFML/System/Win32/SleepImpl.hpp
@@ -29,11 +29,12 @@
 // Headers
 ////////////////////////////////////////////////////////////
 #include <SFML/Config.hpp>
-#include <SFML/System/Time.hpp>
 
+namespace sf { class Time; }
 
 namespace sf::priv
 {
+
 ////////////////////////////////////////////////////////////
 /// \brief Windows implementation of sf::Sleep
 ///
diff --git a/src/SFML/Window/Unix/ClipboardImpl.cpp b/src/SFML/Window/Unix/ClipboardImpl.cpp
index 8c21cffb2..6723a7e2d 100644
--- a/src/SFML/Window/Unix/ClipboardImpl.cpp
+++ b/src/SFML/Window/Unix/ClipboardImpl.cpp
@@ -29,6 +29,7 @@
 #include <SFML/Window/Unix/Display.hpp>
 #include <SFML/System/Clock.hpp>
 #include <SFML/System/Err.hpp>
+#include <SFML/System/Time.hpp>
 #include <X11/Xatom.h>
 #include <vector>
 
diff --git a/src/SFML/Window/Unix/WindowImplX11.cpp b/src/SFML/Window/Unix/WindowImplX11.cpp
index 382e4653c..636df98df 100644
--- a/src/SFML/Window/Unix/WindowImplX11.cpp
+++ b/src/SFML/Window/Unix/WindowImplX11.cpp
@@ -33,6 +33,7 @@
 #include <SFML/System/Utf.hpp>
 #include <SFML/System/Err.hpp>
 #include <SFML/System/Sleep.hpp>
+#include <SFML/System/Time.hpp>
 
 #include <X11/Xlibint.h>
 #undef min // Defined by `Xlibint.h`, conflicts with standard headers
diff --git a/src/SFML/Window/Win32/JoystickImpl.cpp b/src/SFML/Window/Win32/JoystickImpl.cpp
index 8d0bf71c0..f4bf43a17 100644
--- a/src/SFML/Window/Win32/JoystickImpl.cpp
+++ b/src/SFML/Window/Win32/JoystickImpl.cpp
@@ -29,6 +29,7 @@
 #include <SFML/System/Win32/WindowsHeader.hpp>
 #include <SFML/System/Clock.hpp>
 #include <SFML/System/Err.hpp>
+#include <SFML/System/Time.hpp>
 #include <tchar.h>
 #include <regstr.h>
 #include <cmath>
diff --git a/src/SFML/Window/WindowImpl.cpp b/src/SFML/Window/WindowImpl.cpp
index b5b603391..a98e88acc 100644
--- a/src/SFML/Window/WindowImpl.cpp
+++ b/src/SFML/Window/WindowImpl.cpp
@@ -31,6 +31,7 @@
 #include <SFML/Window/JoystickManager.hpp>
 #include <SFML/Window/SensorManager.hpp>
 #include <SFML/System/Sleep.hpp>
+#include <SFML/System/Time.hpp>
 #include <algorithm>
 #include <memory>
 #include <cmath>
diff --git a/src/SFML/Window/iOS/EaglContext.mm b/src/SFML/Window/iOS/EaglContext.mm
index bb18671e3..013e25217 100644
--- a/src/SFML/Window/iOS/EaglContext.mm
+++ b/src/SFML/Window/iOS/EaglContext.mm
@@ -30,6 +30,7 @@
 #include <SFML/Window/iOS/SFView.hpp>
 #include <SFML/System/Err.hpp>
 #include <SFML/System/Sleep.hpp>
+#include <SFML/System/Time.hpp>
 #include <OpenGLES/EAGL.h>
 #include <OpenGLES/EAGLDrawable.h>
 #include <QuartzCore/CAEAGLLayer.h>
diff --git a/test/System/Clock.cpp b/test/System/Clock.cpp
index 69765f79a..2c5631a2c 100644
--- a/test/System/Clock.cpp
+++ b/test/System/Clock.cpp
@@ -1,4 +1,5 @@
 #include <SFML/System/Clock.hpp>
+#include <SFML/System/Time.hpp>
 #include "SystemUtil.hpp"
 #include <thread>