diff --git a/include/SFML/Graphics/RenderWindow.hpp b/include/SFML/Graphics/RenderWindow.hpp
index 5adc08cc..5dc114db 100644
--- a/include/SFML/Graphics/RenderWindow.hpp
+++ b/include/SFML/Graphics/RenderWindow.hpp
@@ -89,7 +89,7 @@ public :
     /// \param settings Additional settings for the underlying OpenGL context
     ///
     ////////////////////////////////////////////////////////////
-    RenderWindow(WindowHandle handle, const ContextSettings& settings = ContextSettings());
+    explicit RenderWindow(WindowHandle handle, const ContextSettings& settings = ContextSettings());
 
     ////////////////////////////////////////////////////////////
     /// \brief Destructor
diff --git a/include/SFML/Window/Window.hpp b/include/SFML/Window/Window.hpp
index 6d7729d9..74d7c9a4 100644
--- a/include/SFML/Window/Window.hpp
+++ b/include/SFML/Window/Window.hpp
@@ -103,7 +103,7 @@ public :
     /// \param settings Additional settings for the underlying OpenGL context
     ///
     ////////////////////////////////////////////////////////////
-    Window(WindowHandle handle, const ContextSettings& settings = ContextSettings());
+    explicit Window(WindowHandle handle, const ContextSettings& settings = ContextSettings());
 
     ////////////////////////////////////////////////////////////
     /// \brief Destructor