Index: /trunk/src/VBox/Main/hgcm/HGCM.cpp
===================================================================
--- /trunk/src/VBox/Main/hgcm/HGCM.cpp	(revision 221)
+++ /trunk/src/VBox/Main/hgcm/HGCM.cpp	(revision 222)
@@ -1149,5 +1149,5 @@
                 {
                     LogFlow(("HGCMMSGID_HOSTCALL found service, forwarding the call.\n"));
-                    pService->HostCall (0, NULL, pMsg->u32Function, pMsg->cParms, pMsg->paParms);
+                    pService->HostCall (NULL, 0, pMsg->u32Function, pMsg->cParms, pMsg->paParms);
                 }
             } break;