diff --git a/lam/lib/modules/sambaSamAccount.inc b/lam/lib/modules/sambaSamAccount.inc
index f0d5247a..58c0ff1b 100644
--- a/lam/lib/modules/sambaSamAccount.inc
+++ b/lam/lib/modules/sambaSamAccount.inc
@@ -650,6 +650,9 @@ class sambaSamAccount extends baseModule implements passwordService {
 				return false;			
 			}
 		}
+		if (!isset($this->attributes['sambaSID']) || ($this->attributes['sambaSID'] == '')) {
+			return false;
+		}
 		return true;
 	}