diff --git a/docs/object-methods.md b/docs/object-methods.md
index f7f964d..4d5baf2 100644
--- a/docs/object-methods.md
+++ b/docs/object-methods.md
@@ -544,7 +544,7 @@ const o = Object.setPrototypeOf({}, null);
 该方法等同于下面的函数。
 
 ```javascript
-function (obj, proto) {
+function setPrototypeOf(obj, proto) {
   obj.__proto__ = proto;
   return obj;
 }