diff --git a/src/backend/catalog/information_schema.sql b/src/backend/catalog/information_schema.sql
index 0fbcfa8..3891e3b 100644
--- a/src/backend/catalog/information_schema.sql
+++ b/src/backend/catalog/information_schema.sql
@@ -216,7 +216,7 @@ CREATE DOMAIN character_data AS character varying COLLATE "C";
  * SQL_IDENTIFIER domain
  */
 
-CREATE DOMAIN sql_identifier AS character varying COLLATE "C";
+CREATE DOMAIN sql_identifier AS name;