1 files changed, 7 insertions, 2 deletions
diff --git a/synapse/handlers/room.py b/synapse/handlers/room.py
index 38bf2ef711..116a998c42 100644
--- a/synapse/handlers/room.py
+++ b/synapse/handlers/room.py
@@ -525,8 +525,13 @@ class RoomMemberHandler(BaseHandler):
                 do_auth=do_auth,
             )
 
-        user = UserID.from_string(event.user_id)
-        yield user_joined_room(self.distributor, user, room_id)
+        prev_state = context.current_state.get((event.type, event.state_key))
+        if not prev_state or prev_state.membership != Membership.JOIN:
+            # Only fire user_joined_room if the user has acutally joined the
+            # room. Don't bother if the user is just changing their profile
+            # info.
+            user = UserID.from_string(event.user_id)
+            yield user_joined_room(self.distributor, user, room_id)
 
     @defer.inlineCallbacks
     def get_inviter(self, event):