Index: /trunk/src/VBox/Main/src-client/VirtualBoxClientImpl.cpp
===================================================================
--- /trunk/src/VBox/Main/src-client/VirtualBoxClientImpl.cpp	(revision 66511)
+++ /trunk/src/VBox/Main/src-client/VirtualBoxClientImpl.cpp	(revision 66512)
@@ -299,4 +299,5 @@
                                                              EOAC_NONE,
                                                              NULL);
+    NOREF(hrGUICoInitializeSecurity);
     Assert(SUCCEEDED(hrGUICoInitializeSecurity) || hrGUICoInitializeSecurity == RPC_E_TOO_LATE);
 #endif