Index: /trunk/src/VBox/Frontends/VirtualBox/src/globals/UIDesktopWidgetWatchdog.h
===================================================================
--- /trunk/src/VBox/Frontends/VirtualBox/src/globals/UIDesktopWidgetWatchdog.h	(revision 64766)
+++ /trunk/src/VBox/Frontends/VirtualBox/src/globals/UIDesktopWidgetWatchdog.h	(revision 64767)
@@ -108,5 +108,8 @@
 private slots:
 
-#if QT_VERSION < 0x050000
+#if QT_VERSION == 0
+    /** Stupid moc does not warn if it cannot find headers! */
+    void QT_VERSION_NOT_DEFINED
+#elif QT_VERSION < 0x050000
     /** Handles host-screen count change to @a cHostScreenCount. */
     void sltHandleHostScreenCountChanged(int cHostScreenCount);
Index: /trunk/src/VBox/Frontends/VirtualBox/src/runtime/UIKeyboardHandler.h
===================================================================
--- /trunk/src/VBox/Frontends/VirtualBox/src/runtime/UIKeyboardHandler.h	(revision 64766)
+++ /trunk/src/VBox/Frontends/VirtualBox/src/runtime/UIKeyboardHandler.h	(revision 64767)
@@ -136,4 +136,7 @@
     /** Finalises keyboard capture. */
     void sltFinaliseCaptureKeyboard();
+#elif QT_VERSION == 0
+    /** Stupid moc does not warn if it cannot find headers! */
+    void QT_VERSION_NOT_DEFINED
 #endif
 
Index: /trunk/src/VBox/Frontends/VirtualBox/src/selector/UISelectorWindow.h
===================================================================
--- /trunk/src/VBox/Frontends/VirtualBox/src/selector/UISelectorWindow.h	(revision 64766)
+++ /trunk/src/VBox/Frontends/VirtualBox/src/selector/UISelectorWindow.h	(revision 64767)
@@ -83,4 +83,7 @@
     /** Handles host-screen available-area change. */
     void sltHandleHostScreenAvailableAreaChange();
+#elif QT_VERSION == 0
+    /** Stupid moc does not warn if it cannot find headers! */
+    void QT_VERSION_NOT_DEFINED
 #endif /* VBOX_WS_X11 && QT_VERSION >= 0x050000 */