diff --git a/rhodecode/templates/pullrequests/pullrequest.html b/rhodecode/templates/pullrequests/pullrequest.html
--- a/rhodecode/templates/pullrequests/pullrequest.html
+++ b/rhodecode/templates/pullrequests/pullrequest.html
@@ -133,6 +133,7 @@
                          other_ref_type='__org_ref_type__',
                          other_ref='__org_ref__',
                          as_form=True,
+                         merge=True,
                          )}";
       var org_repo = YUQ('#pull_request_form #org_repo')[0].value;
       var org_ref = YUQ('#pull_request_form #org_ref')[0].value.split(':');