Index: /trunk/src/VBox/Frontends/VirtualBox/src/runtime/UIMouseHandler.cpp
===================================================================
--- /trunk/src/VBox/Frontends/VirtualBox/src/runtime/UIMouseHandler.cpp	(revision 57591)
+++ /trunk/src/VBox/Frontends/VirtualBox/src/runtime/UIMouseHandler.cpp	(revision 57592)
@@ -21,4 +21,5 @@
 
 /* Qt includes: */
+# include <QDesktopWidget>
 # include <QMouseEvent>
 # include <QTimer>