diff --git a/modules/highgui/src/window_QT.cpp b/modules/highgui/src/window_QT.cpp
index 7c06816016..3bd794bd5d 100755
--- a/modules/highgui/src/window_QT.cpp
+++ b/modules/highgui/src/window_QT.cpp
@@ -42,6 +42,7 @@
 #ifdef HAVE_QT
 
 #include <window_QT.h>
+#include <QVarLengthArray>
 
 //Static and global first
 static GuiReceiver guiMainThread;