diff --git a/docs/maputil_zh-CN.md b/docs/maputil_zh-CN.md
index 46be0b6..4572c03 100644
--- a/docs/maputil_zh-CN.md
+++ b/docs/maputil_zh-CN.md
@@ -27,6 +27,7 @@ import (
 - [Merge](#Merge)
 - [Minus](#Minus)
 - [Values](#Values)
+- [IsDisjoint](#IsDisjoint)
 
 <div STYLE="page-break-after: always;"></div>