diff --git a/ydb/docs/ru/core/yql/reference/yql-core/types/_includes/serial.md b/ydb/docs/ru/core/yql/reference/yql-core/types/_includes/serial.md
index 4e5df8c5f00d..0b8f4cdb06ad 100644
--- a/ydb/docs/ru/core/yql/reference/yql-core/types/_includes/serial.md
+++ b/ydb/docs/ru/core/yql/reference/yql-core/types/_includes/serial.md
@@ -6,7 +6,7 @@
 
 ``` yql
 CREATE TABLE users (
-    user_id SERIAL,
+    user_id Serial,
     name Utf8,
     email Utf8,
     PRIMARY KEY (user_id)