Index: /trunk/src/VBox/Additions/common/VBoxService/VBoxServiceVMInfo.cpp
===================================================================
--- /trunk/src/VBox/Additions/common/VBoxService/VBoxServiceVMInfo.cpp	(revision 29860)
+++ /trunk/src/VBox/Additions/common/VBoxService/VBoxServiceVMInfo.cpp	(revision 29861)
@@ -249,8 +249,8 @@
             if (cUsersInList > 0)
             {
-                rc = RTStrAAppend(pszUserList, ",");
+                rc = RTStrAAppend(&pszUserList, ",");
                 AssertRCReturn(rc, rc);
             }
-            rc = RTStrAAppend(pszUserList, ut_user->ut_user);
+            rc = RTStrAAppend(&pszUserList, ut_user->ut_user);
             AssertRCReturn(rc, rc);
             cUsersInList++;