diff --git a/source/xWindow/Window.cpp b/source/xWindow/Window.cpp
index 68eeedd455137137ddf4eda381f3b6503dc53c62..a30aa319184f57244f59a54e0675ba7daff04186 100644
--- a/source/xWindow/Window.cpp
+++ b/source/xWindow/Window.cpp
@@ -20,7 +20,7 @@ struct ACCENTPOLICY
 	int AnimationId;
 };
 
-typedef BOOL (*WINAPI FNPTRSetWindowCompositionAttribute)(HWND hwnd, WINCOMPATTRDATA* pAttrData);
+// typedef BOOL (*WINAPI FNPTRSetWindowCompositionAttribute)(HWND hwnd, WINCOMPATTRDATA* pAttrData);
 
 static LRESULT CALLBACK WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
 {