diff --git a/synapse/storage/databases/main/roommember.py b/synapse/storage/databases/main/roommember.py
index 32e1e983a5da..93bbc46208bd 100644
--- a/synapse/storage/databases/main/roommember.py
+++ b/synapse/storage/databases/main/roommember.py
@@ -751,7 +751,6 @@ def do_users_share_a_room_txn(
                     SELECT room_id, state_key FROM current_state_events
                     WHERE type = 'm.room.member' AND membership = 'join' AND {clause}
                 ) AS b using (room_id)
-                LIMIT 1
             """
 
             txn.execute(sql, (user_id, *args))