diff --git a/synapse/federation/transport/client.py b/synapse/federation/transport/client.py
index 0f7f656824..1fe162d55b 100644
--- a/synapse/federation/transport/client.py
+++ b/synapse/federation/transport/client.py
@@ -862,7 +862,7 @@ class TransportLayerClient(object):
                            content):
         """Sets the join policy for a group
         """
-        path = PREFIX + "/groups/%s/setting/m.join_policy" % (group_id,)
+        path = PREFIX + "/groups/%s/settings/m.join_policy" % (group_id,)
 
         return self.client.post_json(
             destination=destination,
diff --git a/synapse/federation/transport/server.py b/synapse/federation/transport/server.py
index a52d3948f4..3658ca75f3 100644
--- a/synapse/federation/transport/server.py
+++ b/synapse/federation/transport/server.py
@@ -1128,7 +1128,7 @@ class FederationGroupsBulkPublicisedServlet(BaseFederationServlet):
 class FederationGroupsSettingJoinPolicyServlet(BaseFederationServlet):
     """Sets whether a group is joinable without an invite or knock
     """
-    PATH = "/groups/(?P<group_id>[^/]*)/setting/m.join_policy$"
+    PATH = "/groups/(?P<group_id>[^/]*)/settings/m.join_policy$"
 
     @defer.inlineCallbacks
     def on_POST(self, origin, content, query, group_id):
diff --git a/synapse/rest/client/v2_alpha/groups.py b/synapse/rest/client/v2_alpha/groups.py
index 8faaa1d6a0..3bb1ec2af6 100644
--- a/synapse/rest/client/v2_alpha/groups.py
+++ b/synapse/rest/client/v2_alpha/groups.py
@@ -405,7 +405,7 @@ class GroupInvitedUsersServlet(RestServlet):
 class GroupSettingJoinPolicyServlet(RestServlet):
     """Set group join policy
     """
-    PATTERNS = client_v2_patterns("/groups/(?P<group_id>[^/]*)/setting/m.join_policy$")
+    PATTERNS = client_v2_patterns("/groups/(?P<group_id>[^/]*)/settings/m.join_policy$")
 
     def __init__(self, hs):
         super(GroupSettingJoinPolicyServlet, self).__init__()