diff --git a/src/Bridge/AccessTokenRepository.php b/src/Bridge/AccessTokenRepository.php
index 81f29407e..9f44e4cad 100644
--- a/src/Bridge/AccessTokenRepository.php
+++ b/src/Bridge/AccessTokenRepository.php
@@ -70,6 +70,6 @@ public function revokeAccessToken($tokenId)
     public function isAccessTokenRevoked($tokenId)
     {
         return ! $this->database->table('oauth_access_tokens')
-                    ->where('id', $tokenId)->where('revoked', 0)->exists();
+                    ->where('id', $tokenId)->where('revoked', false)->exists();
     }
 }