diff --git a/project/include/ui/Window.h b/project/include/ui/Window.h
index a8286c342..4abf98ead 100644
--- a/project/include/ui/Window.h
+++ b/project/include/ui/Window.h
@@ -34,6 +34,7 @@ namespace lime {
 			virtual void SetIcon (ImageBuffer *imageBuffer) = 0;
 			virtual bool SetMinimized (bool minimized) = 0;
 			virtual const char* SetTitle (const char* title) = 0;
+			virtual void Alert (int count, int speed, bool stop_on_foreground) = 0;
 			
 			Application* currentApplication;
 			int flags;
@@ -64,4 +65,4 @@ namespace lime {
 }
 
 
-#endif
\ No newline at end of file
+#endif