diff --git a/src/kits/interface/Window.cpp b/src/kits/interface/Window.cpp
index 6ad66e7cb3..2bd7b65bd1 100644
--- a/src/kits/interface/Window.cpp
+++ b/src/kits/interface/Window.cpp
@@ -2431,7 +2431,7 @@ BWindow::_InitData(BRect frame, const char* title, window_look look,
 
 	fFeel = feel;
 	fLook = look;
-	fFlags = flags;
+	fFlags = flags | B_ASYNCHRONOUS_CONTROLS;
 
 	fInTransaction = false;
 	fActive = false;