diff --git a/tumblr_backup.py b/tumblr_backup.py
index 7250939..d4f7ef4 100755
--- a/tumblr_backup.py
+++ b/tumblr_backup.py
@@ -868,7 +868,11 @@ def _backup(posts, post_respfiles):
                     break
 
                 if options.likes:
-                    before = resp['_links']['next']['query_params']['before']
+                    next_ = resp['_links'].get('next')
+                    if next_ is None:
+                        log.status('Backing up posts end of likes, finishing\r')
+                        break
+                    before = next_['query_params']['before']
                 i += MAX_POSTS
         except:
             # ensure proper thread pool termination