diff --git a/src/frontends/qt4/GuiView.C b/src/frontends/qt4/GuiView.C
index 263f41c62a..63aef852fe 100644
--- a/src/frontends/qt4/GuiView.C
+++ b/src/frontends/qt4/GuiView.C
@@ -46,6 +46,7 @@
 #include <QPixmap>
 #include <QStatusBar>
 #include <QToolBar>
+#include <QDesktopWidget>
 
 #include <boost/bind.hpp>