1 files changed, 5 insertions, 1 deletions
diff --git a/synapse/storage/_base.py b/synapse/storage/_base.py
index 5cb26ad6db..befeb55b25 100644
--- a/synapse/storage/_base.py
+++ b/synapse/storage/_base.py
@@ -64,7 +64,11 @@ class SQLBaseStore(object):
 
         def interaction(txn):
             cursor = txn.execute(query, args)
-            return decoder(cursor)
+            if decoder:
+                return decoder(cursor)
+            else:
+                return cursor
+
         return self._db_pool.runInteraction(interaction)
 
     def _execut_query(self, query, *args):