diff --git a/lib/Bitbucket/API/Http/Listener/OAuthListener.php b/lib/Bitbucket/API/Http/Listener/OAuthListener.php
index 4bf395a..e8a3a93 100644
--- a/lib/Bitbucket/API/Http/Listener/OAuthListener.php
+++ b/lib/Bitbucket/API/Http/Listener/OAuthListener.php
@@ -217,9 +217,9 @@ protected function getSigner()
      */
     protected function initToken($token)
     {
-        return (!is_null($token)) ?
+        return ((!is_null($token)) ?
             $token :
-            empty($this->config['oauth_token']) ?
+            empty($this->config['oauth_token'])) ?
                 new OAuth1\Token\NullToken() :
                 new OAuth1\Token\Token($this->config['oauth_token'], $this->config['oauth_token_secret'])
             ;