diff --git a/account_direct_debit/migrations/7.0.2/pre-migration.py b/account_direct_debit/migrations/7.0.2/pre-migration.py
index 49c0db52f..b57543527 100644
--- a/account_direct_debit/migrations/7.0.2/pre-migration.py
+++ b/account_direct_debit/migrations/7.0.2/pre-migration.py
@@ -37,7 +37,7 @@ def rename_columns(cr, column_spec):
     for table in column_spec.keys():
         for (old, new) in column_spec[table]:
             logger.info("table %s, column %s: renaming to %s", table, old, new)
-            cr.execute('ALTER TABLE %s RENAME %s TO %s', (table, old, new,))
+            cr.execute('ALTER TABLE %s RENAME %s TO %s' % (table, old, new,))
             cr.execute('DROP INDEX IF EXISTS "%s_%s_index"' % (table, old))