diff --git a/Controller/Component/OAuthComponent.php b/Controller/Component/OAuthComponent.php
index df1fd6e..85d1dba 100644
--- a/Controller/Component/OAuthComponent.php
+++ b/Controller/Component/OAuthComponent.php
@@ -561,7 +561,7 @@ public function checkUserCredentials($client_id, $username, $password) {
 			'recursive' => -1
 		));
 		if ($user) {
-			return array('user_id' => $user['User'][$this->User->primaryKey]);
+			return array('user_id' => $user[$this->authenticate['userModel']][$this->User->primaryKey]);
 		}
 		return false;
 	}