diff --git a/src/frontends/qt4/Dialog.h b/src/frontends/qt4/Dialog.h
index d54dd70f38..fb0f1ac644 100644
--- a/src/frontends/qt4/Dialog.h
+++ b/src/frontends/qt4/Dialog.h
@@ -14,7 +14,7 @@
 
 #include "lfuns.h"
 
-#include <QString.h>
+#include <QString>
 #include <string>
 
 class QWidget;