diff --git a/twitter.inc b/twitter.inc
index 6c7d7ad..b6fde48 100644
--- a/twitter.inc
+++ b/twitter.inc
@@ -178,6 +178,9 @@ function twitter_fetch_user_timeline($id) {
 
   // Connect to the Twitter's API.
   $twitter = twitter_connect();
+  if (!$twitter) {
+    return;
+  }
   $params = array();
   if ($since) {
     $params['since_id'] = $since;