diff --git a/src/Gui/Qt4All.h b/src/Gui/Qt4All.h
index 6be2704aa0..f8cd9c8684 100644
--- a/src/Gui/Qt4All.h
+++ b/src/Gui/Qt4All.h
@@ -28,6 +28,7 @@
 // QtCore
 #include <qglobal.h>
 #include <QBuffer>
+#include <QElapsedTimer>
 #include <qeventloop.h>
 #include <qfile.h>
 #include <QLibraryInfo>