Index: /trunk/src/VBox/Main/src-client/GuestCtrlImpl.cpp
===================================================================
--- /trunk/src/VBox/Main/src-client/GuestCtrlImpl.cpp	(revision 35868)
+++ /trunk/src/VBox/Main/src-client/GuestCtrlImpl.cpp	(revision 35869)
@@ -5,5 +5,5 @@
 
 /*
- * Copyright (C) 2006-2010 Oracle Corporation
+ * Copyright (C) 2006-2011 Oracle Corporation
  *
  * This file is part of VirtualBox Open Source Edition (OSE), as
@@ -2205,5 +2205,7 @@
     ReturnComNotImplemented();
 #else  /* VBOX_WITH_GUEST_CONTROL */
-    using namespace guestControl;
+    CheckComArgNotNull(aExitCode);
+    CheckComArgNotNull(aFlags);
+    CheckComArgNotNull(aStatus);
 
     AutoCaller autoCaller(this);