diff --git a/constraints/constraint_username.inc b/constraints/constraint_username.inc
index e500e66..604121f 100644
--- a/constraints/constraint_username.inc
+++ b/constraints/constraint_username.inc
@@ -25,7 +25,10 @@ function password_policy_constraint_username_error($constraint) {
  * Password validation.
  */
 function password_policy_constraint_username_validate($constraint, $account) {
-  return drupal_strtolower($account->name) != drupal_strtolower($account->pass);
+  if($constraint && (drupal_strtolower($account->name) == drupal_strtolower($account->pass))) {
+    return FALSE;
+  }
+  return TRUE;
 }
 
 /**