diff --git a/SoObjects/SOGo/SOGoUserManager.m b/SoObjects/SOGo/SOGoUserManager.m
index 1fb183188..2b522a157 100644
--- a/SoObjects/SOGo/SOGoUserManager.m
+++ b/SoObjects/SOGo/SOGoUserManager.m
@@ -525,6 +525,9 @@ static Class NSNullK;
   SOGoSystemDefaults *sd;
   BOOL checkOK;
 
+  if (!_login)
+    return NO;
+
   sd = [SOGoSystemDefaults sharedSystemDefaults];
 
   username = _login;