diff --git a/docs/en/sql-reference/syntax.md b/docs/en/sql-reference/syntax.md
index 296f5c7c5f3..5d0eee76393 100644
--- a/docs/en/sql-reference/syntax.md
+++ b/docs/en/sql-reference/syntax.md
@@ -57,7 +57,7 @@ Identifiers are:
 
 Identifiers can be quoted or non-quoted. The latter is preferred.
 
-Non-quoted identifiers must match the regex `^[0-9a-zA-Z_]*[a-zA-Z_]$` and can not be equal to [keywords](#syntax-keywords). Examples: `x, _1, X_y__Z123_.`
+Non-quoted identifiers must match the regex `^[a-zA-Z_][0-9a-zA-Z_]*$` and can not be equal to [keywords](#syntax-keywords). Examples: `x`, `_1`, `X_y__Z123_`.
 
 If you want to use identifiers the same as keywords or you want to use other symbols in identifiers, quote it using double quotes or backticks, for example, `"id"`, `` `id` ``.