diff --git a/src/LdapAuthUserProvider.php b/src/LdapAuthUserProvider.php
index 863c8ae..5dd7c0d 100644
--- a/src/LdapAuthUserProvider.php
+++ b/src/LdapAuthUserProvider.php
@@ -50,7 +50,7 @@ public function retrieveByID($identifier)
         $userNameField = $this->getUsernameField();
 
         if ($this->model) {
-            $model = $this->createModel()->newQuery()->find($identifier);
+            $model = $this->createModel()->newQuery()->where($this->getUsernameField(), $identifier)->first();
         }
 
         if (isset($model)) {