diff --git a/matrix_gpt/bot/callbacks.py b/matrix_gpt/bot/callbacks.py
index 87ea59e..b85e12b 100644
--- a/matrix_gpt/bot/callbacks.py
+++ b/matrix_gpt/bot/callbacks.py
@@ -190,6 +190,7 @@ class Callbacks:
         #              f"commands a second time).")
 
         if event.server_timestamp > self.startup_ts:
+            logger.critical(f'Decryption failure for event {event.event_id} in room {room.room_id}')
             await react_to_event(self.client, room.room_id, event.event_id, "❌ 🔐")
 
     async def unknown(self, room: MatrixRoom, event: UnknownEvent) -> None: