diff --git a/redash/query_runner/mssql.py b/redash/query_runner/mssql.py
index 40f52a7794..71375b71ad 100644
--- a/redash/query_runner/mssql.py
+++ b/redash/query_runner/mssql.py
@@ -92,7 +92,7 @@ def _get_tables(self, schema):
 
         for row in results['rows']:
             if row['table_schema'] != self.configuration['db']:
-                table_name = '{}.{}'.format(row['table_schema'], row['table_name'])
+                table_name = u'{}.{}'.format(row['table_schema'], row['table_name'])
             else:
                 table_name = row['table_name']