diff --git a/docs-2.0/3.ngql-guide/3.data-types/5.null.md b/docs-2.0/3.ngql-guide/3.data-types/5.null.md
index f38a9570082..72d6ac7e527 100644
--- a/docs-2.0/3.ngql-guide/3.data-types/5.null.md
+++ b/docs-2.0/3.ngql-guide/3.data-types/5.null.md
@@ -77,7 +77,7 @@ nebula> INSERT VERTEX player(name) VALUES "Kobe":("Kobe");
 查询点`Kobe`，属性`age`为默认值`18`。
 
 ```ngql
-nebula> FETCH PROP ON player "Kobe"
+nebula> FETCH PROP ON player "Kobe";
 +-----------------------------------------+
 | vertices_                               |
 +-----------------------------------------+