Fix missing conditional for registering `on_remove_user_third_party_identifier` module api callbacks (#15227

1 files changed, 5 insertions, 0 deletions

diff --git a/synapse/events/third_party_rules.py b/synapse/events/third_party_rules.py

index 3e4d52c8d8..61d4530be7 100644
--- a/synapse/events/third_party_rules.py
+++ b/synapse/events/third_party_rules.py
@@ -247,6 +247,11 @@ class ThirdPartyEventRules:
                 on_add_user_third_party_identifier
             )
 
+        if on_remove_user_third_party_identifier is not None:
+            self._on_remove_user_third_party_identifier_callbacks.append(
+                on_remove_user_third_party_identifier
+            )
+
     async def check_event_allowed(
         self,
         event: EventBase,