diff --git a/src/RefreshTokenRepository.php b/src/RefreshTokenRepository.php
index ded3b0a85..bca0269e3 100644
--- a/src/RefreshTokenRepository.php
+++ b/src/RefreshTokenRepository.php
@@ -52,11 +52,11 @@ public function revokeRefreshToken($id)
      * Revokes refresh tokens by access token id.
      *
      * @param  string  $tokenId
-     * @return void
+     * @return mixed
      */
     public function revokeRefreshTokensByAccessTokenId($tokenId)
     {
-        Passport::refreshToken()->where('access_token_id', $tokenId)->update(['revoked' => true]);
+        return Passport::refreshToken()->where('access_token_id', $tokenId)->update(['revoked' => true]);
     }
 
     /**