diff --git a/forwardport/models/project.py b/forwardport/models/project.py
index 0e2500b9..b3dce75c 100644
--- a/forwardport/models/project.py
+++ b/forwardport/models/project.py
@@ -443,10 +443,16 @@ class PullRequests(models.Model):
                 # only link to previous PR of sequence if cherrypick passed
                 'parent_id': pr.id if not has_conflicts else False,
             })
+            # delegate original author on merged original PR & on new PR so
+            # they can r+ the forward ports (via mergebot or forwardbot)
+            source.author.write({
+                'delegate_reviewer': [
+                    (4, source.id, False),
+                    (4, new_pr.id, False),
+                ]
+            })
 
-            assignees = (new_pr.source_id.author | new_pr.source_id.reviewed_by) \
-                .filtered(lambda p: new_pr.source_id._pr_acl(p).is_reviewer) \
-                .mapped('github_login')
+            assignees = (source.author | source.reviewed_by).mapped('github_login')
             ping = "Ping %s" % ', '.join('@' + login for login in assignees if login)
             if h:
                 sout = serr = ''
diff --git a/forwardport/tests/test_simple.py b/forwardport/tests/test_simple.py
index 6727f9dc..8ef76dc8 100644
--- a/forwardport/tests/test_simple.py
+++ b/forwardport/tests/test_simple.py
@@ -191,14 +191,14 @@ def test_straightforward_flow(env, config, make_repo, users):
     }
     assert prod.get_pr(pr2.number).comments == [
         (users['user'], """\
-Ping @%s
+Ping @%s, @%s
 This PR targets c and is the last of the forward-port chain.
 
 To merge the full chain, say
 > @%s r+
 
 More info at https://github.com/odoo/odoo/wiki/Mergebot#forward-port
-""" % (users['reviewer'], project.fp_github_name)),
+""" % (users['other'], users['reviewer'], project.fp_github_name)),
     ]
     with prod:
         prod.post_status(pr2.head, 'success', 'ci/runbot')
@@ -822,21 +822,21 @@ def test_default_disabled(env, config, make_repo, users):
     assert len(cs) == 1
     assert pr2.comments == [
         (users['user'], """\
-Ping @%s
+Ping @%s, @%s
 This PR targets b and is the last of the forward-port chain.
 
 To merge the full chain, say
 > @%s r+
 
 More info at https://github.com/odoo/odoo/wiki/Mergebot#forward-port
-""" % (users['reviewer'], users['user'])),
+""" % (users['user'], users['reviewer'], users['user'])),
     ]
 
 # reviewer = of the FP sequence, the original PR is always reviewed by `user`
 # set as reviewer
 Case = collections.namedtuple('Case', 'author reviewer delegate success')
 ACL = [
-    Case('reviewer', 'reviewer', None, False),
+    Case('reviewer', 'reviewer', None, True),
     Case('reviewer', 'self_reviewer', None, False),
     Case('reviewer', 'other', None, False),
     Case('reviewer', 'other', 'other', True),
@@ -848,7 +848,7 @@ ACL = [
 
     Case('other', 'reviewer', None, True),
     Case('other', 'self_reviewer', None, False),
-    Case('other', 'other', None, False),
+    Case('other', 'other', None, True),
     Case('other', 'other', 'other', True),
 ]
 @pytest.mark.parametrize(Case._fields, ACL)