diff --git a/django/db/backends/schema.py b/django/db/backends/schema.py
index fab81ea7df..8b4255267c 100644
--- a/django/db/backends/schema.py
+++ b/django/db/backends/schema.py
@@ -90,7 +90,7 @@ class BaseDatabaseSchemaEditor(object):
         # Log the command we're running, then run it
         logger.debug("%s; (params %r)" % (sql, params))
         if self.collect_sql:
-            self.collected_sql.append((sql % map(self.connection.ops.quote_parameter, params)) + ";")
+            self.collected_sql.append((sql % list(map(self.connection.ops.quote_parameter, params))) + ";")
         else:
             cursor.execute(sql, params)