diff --git a/examples/mainwindows/dockwidgets/mainwindow.cpp b/examples/mainwindows/dockwidgets/mainwindow.cpp
index 5a0c1f6ad9..8ac897455f 100644
--- a/examples/mainwindows/dockwidgets/mainwindow.cpp
+++ b/examples/mainwindows/dockwidgets/mainwindow.cpp
@@ -40,7 +40,7 @@
 
 //! [0]
 #include <QtWidgets>
-
+#include <QtPrintSupport>
 #include "mainwindow.h"
 //! [0]
 
diff --git a/examples/mainwindows/mainwindows.pro b/examples/mainwindows/mainwindows.pro
index 9ed8e7aaff..69897e3e13 100644
--- a/examples/mainwindows/mainwindows.pro
+++ b/examples/mainwindows/mainwindows.pro
@@ -1,5 +1,6 @@
 TEMPLATE      = subdirs
 SUBDIRS       = application \
+		dockwidgets \
                 mainwindow \
                 mdi \
                 menus \