diff --git a/src/window_gui.h b/src/window_gui.h
--- a/src/window_gui.h
+++ b/src/window_gui.h
@@ -281,7 +281,7 @@ protected:
 	void InitializePositionSize(int x, int y, int min_width, int min_height);
 	virtual void FindWindowPlacementAndResize(int def_width, int def_height);
 
-	SmallVector<int, 4> scheduled_invalidation_data;  ///< Data of scheduled OnInvalidateData() calls.
+	std::vector<int> scheduled_invalidation_data;  ///< Data of scheduled OnInvalidateData() calls.
 
 public:
 	Window(WindowDesc *desc);