diff --git a/progit/notify.py b/progit/notify.py
index de3ef99..d23a151 100644
--- a/progit/notify.py
+++ b/progit/notify.py
@@ -141,7 +141,7 @@ The issue: `%s` of project: `%s` has been assigned to `%s` by %s.
 """ % (
     issue.title,
     issue.project.name,
-    issue.assignee.user,
+    new_assignee,
     username,
     '%s/%s/issue/%s' % (
         progit.APP.config['APP_URL'],