1 files changed, 1 insertions, 1 deletions
diff --git a/window.h b/window.h
index 8890777c4..5bc61c665 100644
--- a/window.h
+++ b/window.h
@@ -553,7 +553,7 @@ void DispatchMouseWheelEvent(Window *w, int widget, int wheel);
 void DrawOverlappedWindow(Window *w, int left, int top, int right, int bottom);
 void CallWindowEventNP(Window *w, int event);
 void CallWindowTickEvent(void);
-void SetWindowDirty(Window *w);
+void SetWindowDirty(const Window* w);
 void SendWindowMessageW(Window *w, uint msg, uint wparam, uint lparam);
 void SendWindowMessage(WindowClass wnd_class, WindowNumber wnd_num, uint msg, uint wparam, uint lparam);