diff --git a/synapse/storage/schema/delta/31/search_update.py b/synapse/storage/schema/delta/31/search_update.py
index 46a3795d1..989e990db 100644
--- a/synapse/storage/schema/delta/31/search_update.py
+++ b/synapse/storage/schema/delta/31/search_update.py
@@ -63,3 +63,7 @@ def run_create(cur, database_engine, *args, **kwargs):
         sql = database_engine.convert_param_style(sql)
 
         cur.execute(sql, ("event_search_order", progress_json))
+
+
+def run_upgrade(cur, database_engine, *args, **kwargs):
+    pass