diff --git a/src/kits/interface/Window.cpp b/src/kits/interface/Window.cpp
index 9ec95f64d7..8fe3186531 100644
--- a/src/kits/interface/Window.cpp
+++ b/src/kits/interface/Window.cpp
@@ -2035,6 +2035,7 @@ BWindow::InitData(BRect frame, const char* title, window_look look,
 
 	// TODO: see WHEN is this used!
 	fWaitingForMenu = false;
+	fMenuSem = -1;
 
 	fMinimized = false;