diff --git a/Nuake/src/Window.h b/Nuake/src/Window.h
index fab81918..dc3f7b23 100644
--- a/Nuake/src/Window.h
+++ b/Nuake/src/Window.h
@@ -3,6 +3,9 @@
 #include "Core/Maths.h"
 #include "Core/Timestep.h"
 
+#include <functional>
+
+
 struct GLFWwindow;
 
 namespace Nuake