diff --git a/include/SFML/System/Time.hpp b/include/SFML/System/Time.hpp
index c7d8a402..c806fb28 100644
--- a/include/SFML/System/Time.hpp
+++ b/include/SFML/System/Time.hpp
@@ -30,6 +30,7 @@
 #include <SFML/System/Export.hpp>
 
 #include <chrono>
+#include <ratio>
 
 #include <cstdint>
 
diff --git a/src/SFML/Window/GlResource.cpp b/src/SFML/Window/GlResource.cpp
index e758c0bd..8c0c8405 100644
--- a/src/SFML/Window/GlResource.cpp
+++ b/src/SFML/Window/GlResource.cpp
@@ -28,6 +28,8 @@
 #include <SFML/Window/GlContext.hpp>
 #include <SFML/Window/GlResource.hpp>
 
+#include <utility>
+
 
 namespace sf
 {