diff --git a/MdiWindow.cpp b/MdiWindow.cpp
index acf90fb..a5b5ace 100644
--- a/MdiWindow.cpp
+++ b/MdiWindow.cpp
@@ -871,7 +871,7 @@
 #include "qtpropertymanager.h"
 #include "qtvariantproperty.h"
 #include "qttreepropertybrowser.h"
-#include "QtGroupBoxPropertyBrowser"
+#include "qtgroupboxpropertybrowser.h"
 #include "ObjectTreeModel.h"