diff --git a/sql-statements/sql-statement-create-index.md b/sql-statements/sql-statement-create-index.md
index 1c83bb57c0829..be50e19071f7c 100644
--- a/sql-statements/sql-statement-create-index.md
+++ b/sql-statements/sql-statement-create-index.md
@@ -242,7 +242,7 @@ For details, see [`ALTER INDEX`](/sql-statements/sql-statement-alter-index.md).
 
 ## Associated system variables
 
-The system variables associated with the `CREATE INDEX` statement are `tidb_ddl_reorg_worker_cnt`, `tidb_ddl_reorg_batch_size`, and `tidb_ddl_reorg_priority`. Refer to [system variables](/system-variables.md#tidb_ddl_reorg_worker_cnt) for details.
+The system variables associated with the `CREATE INDEX` statement are `tidb_ddl_reorg_worker_cnt`, `tidb_ddl_reorg_batch_size`, `tidb_enable_auto_increment_in_generated`, and `tidb_ddl_reorg_priority`. Refer to [system variables](/system-variables.md#tidb_ddl_reorg_worker_cnt) for details.
 
 ## MySQL compatibility