diff --git a/mautrix/bridge/matrix.py b/mautrix/bridge/matrix.py
index 421934b8..b86994f0 100644
--- a/mautrix/bridge/matrix.py
+++ b/mautrix/bridge/matrix.py
@@ -357,6 +357,7 @@ async def _handle_encrypted_wait(self, evt: EncryptedEvent, err: SessionNotFound
             except DecryptionError as e:
                 msg = f"\u26a0 Your message was not bridged: {e}"
             else:
+                await self.az.intent.redact(evt.room_id, event_id)
                 await self.int_handle_event(decrypted)
                 return
         else: