diff --git a/roomserver/storage/shared/membership_updater.go b/roomserver/storage/shared/membership_updater.go
index d7bd0d5c8..56365b471 100644
--- a/roomserver/storage/shared/membership_updater.go
+++ b/roomserver/storage/shared/membership_updater.go
@@ -45,6 +45,7 @@ func NewMembershipUpdater(
 	}
 
 	if !useTxns {
+		txn.Commit() // nolint:errcheck
 		txn = nil
 	}