diff --git a/django/db/backends/__init__.py b/django/db/backends/__init__.py
index 25587a7526..5de0ac0a2f 100644
--- a/django/db/backends/__init__.py
+++ b/django/db/backends/__init__.py
@@ -631,8 +631,10 @@ class BaseDatabaseIntrospection(object):
             for model in models.get_models(app):
                 if router.allow_syncdb(self.connection.alias, model):
                     all_models.append(model)
-        return set([m for m in all_models
-            if self.table_name_converter(m._meta.db_table) in map(self.table_name_converter, tables)
+        tables = map(self.table_name_converter, tables)
+        return set([
+            m for m in all_models
+            if self.table_name_converter(m._meta.db_table) in tables
         ])
 
     def sequence_list(self):