diff --git a/load_tweets.py b/load_tweets.py
old mode 100644
new mode 100755
index 4743207..3b4bea8
--- a/load_tweets.py
+++ b/load_tweets.py
@@ -129,9 +129,11 @@ def update_authors(self, authors):
                 kwargs = { 'users': user['_id'] }
                 try:
                     response = k.call('klout', **kwargs)
-                    user['klout_score'] = response['users'][0]['kscore']
                 except klout.KloutError: # probably a 404
                     pass
+                else:
+                    if 'users' in response:
+                        user['klout_score'] = response['users'][0]['kscore']
                 self.db[self.USER_COLL_NAME].remove({'_id': user['_id']})
                 self.db[self.USER_COLL_NAME].insert(user)
                 update_count += 1