diff --git a/url_image_preview/url_image_preview.py b/url_image_preview/url_image_preview.py
index 36db2ff..329d6f3 100644
--- a/url_image_preview/url_image_preview.py
+++ b/url_image_preview/url_image_preview.py
@@ -85,7 +85,8 @@ class Base(object):
         mark = buffer_.create_mark(None, iter_, True)
         # start downloading image
         gajim.thread_interface(helpers.download_image, [
-            self.textview.account, {'src': special_text}],self._update_img, [mark])
+            self.textview.account, {'src': special_text}], self._update_img,
+            [mark])
 
     def _update_img(self, (mem, alt), mark):
         if mem: