diff --git a/src/widgets/util/qundogroup.h b/src/widgets/util/qundogroup.h
index a3254bcdbc..e8b39dd883 100644
--- a/src/widgets/util/qundogroup.h
+++ b/src/widgets/util/qundogroup.h
@@ -37,6 +37,11 @@
 **
 ****************************************************************************/
 
+#if 0
+// syncqt: header is already part of QtGui/QtGui
+#pragma qt_no_master_include
+#endif
+
 #include <QtGui/QUndoGroup>
 
 QT_BEGIN_NAMESPACE
diff --git a/src/widgets/util/qundostack.h b/src/widgets/util/qundostack.h
index f520ab6f95..ddb65af451 100644
--- a/src/widgets/util/qundostack.h
+++ b/src/widgets/util/qundostack.h
@@ -37,6 +37,11 @@
 **
 ****************************************************************************/
 
+#if 0
+// syncqt: header is already part of QtGui/QtGui
+#pragma qt_no_master_include
+#endif
+
 #include <QtGui/QUndoStack>
 
 QT_BEGIN_NAMESPACE