Index: base/system/services/database.c
===================================================================
--- base/system/services/database.c	(revision 71918)
+++ base/system/services/database.c	(working copy)
@@ -163,8 +163,8 @@
     IN PWSTR pszAccountName2)
 {
     if ((pszAccountName1 == NULL && pszAccountName2 == NULL) ||
-        (pszAccountName1 == NULL && wcscmp(pszAccountName2, L"LocalSystem") == 0) ||
-        (pszAccountName2 == NULL && wcscmp(pszAccountName1, L"LocalSystem") == 0) ||
+        (pszAccountName1 == NULL && pszAccountName2 && wcscmp(pszAccountName2, L"LocalSystem") == 0) ||
+        (pszAccountName2 == NULL && pszAccountName1 && wcscmp(pszAccountName1, L"LocalSystem") == 0) ||
         (wcscmp(pszAccountName1, pszAccountName2) == 0))
         return TRUE;