diff --git a/modules/highgui/src/window_QT.cpp b/modules/highgui/src/window_QT.cpp
index 420d2a1dc6..1233993e0a 100644
--- a/modules/highgui/src/window_QT.cpp
+++ b/modules/highgui/src/window_QT.cpp
@@ -994,6 +994,7 @@ void GuiReceiver::createWindow(QString name, int flags)
 
     nb_windows++;
     new CvWindow(name, flags);
+    cvWaitKey(1);
 }