diff --git a/flatlaf-natives/flatlaf-natives-windows/src/main/cpp/HWNDMap.h b/flatlaf-natives/flatlaf-natives-windows/src/main/cpp/HWNDMap.h
index 41b580fd..8ace9a04 100644
--- a/flatlaf-natives/flatlaf-natives-windows/src/main/cpp/HWNDMap.h
+++ b/flatlaf-natives/flatlaf-natives-windows/src/main/cpp/HWNDMap.h
@@ -42,7 +42,7 @@ public:
 	HWNDMap();
 
 	LPVOID get( HWND key );
-	void put( HWND key, LPVOID value );
+	bool put( HWND key, LPVOID value );
 	void remove( HWND key );
 	bool isTableAllocated() noexcept { return static_cast<bool>(table); }