Index: /trunk/src/VBox/Additions/common/VBoxService/VBoxServiceControlSession.cpp
===================================================================
--- /trunk/src/VBox/Additions/common/VBoxService/VBoxServiceControlSession.cpp	(revision 55575)
+++ /trunk/src/VBox/Additions/common/VBoxService/VBoxServiceControlSession.cpp	(revision 55576)
@@ -1824,5 +1824,5 @@
         /* Is this an anonymous session? */
         /* Anonymous sessions run with the same privileges as the main VBoxService executable. */
-        bool fAnonymous = !RT_BOOL(strlen(pSessionThread->StartupInfo.szUser));
+        bool const fAnonymous = pSessionThread->StartupInfo.szUser[0] == '\0';
         if (fAnonymous)
         {