diff --git a/src/frontends/qt4/LyXToolBox.h b/src/frontends/qt4/LyXToolBox.h
index ec70ceb05f..03bd00e962 100644
--- a/src/frontends/qt4/LyXToolBox.h
+++ b/src/frontends/qt4/LyXToolBox.h
@@ -12,7 +12,7 @@
 #ifndef LYXTOOLBOX_H
 #define LYXTOOLBOX_H
 
-#include <QtGui/QToolBox>
+#include <QToolBox>
 
 namespace lyx {
 namespace frontend {