diff --git a/src/plugins/platforms/cocoa/qcocoaeventdispatcher.mm b/src/plugins/platforms/cocoa/qcocoaeventdispatcher.mm
index 2ac9a5dac9..9a661ffe5a 100644
--- a/src/plugins/platforms/cocoa/qcocoaeventdispatcher.mm
+++ b/src/plugins/platforms/cocoa/qcocoaeventdispatcher.mm
@@ -594,6 +594,7 @@ void QCocoaEventDispatcherPrivate::temporarilyStopAllModalSessions()
         if (info.session) {
             [NSApp endModalSession:info.session];
             info.session = 0;
+            [(NSWindow*) info.nswindow release];
         }
     }
     currentModalSessionCached = 0;