Index: reviewboard/reviews/forms.py
===================================================================
--- reviewboard/reviews/forms.py	(revision 1078)
+++ reviewboard/reviews/forms.py	(revision 1079)
@@ -95,6 +95,8 @@
             self.errors['diff_path'] = forms.util.ErrorList([e])
             raise
 
+        review_request.add_default_reviewers()
+        review_request.save()
         return review_request