diff --git a/docs/frame.md b/docs/frame.md
index f72d19bba8fba4db4f5e93becfc9338544d81f02..3f7f54fdffbe1a55711a334677cdf0a77cb6a596 100644
--- a/docs/frame.md
+++ b/docs/frame.md
@@ -540,7 +540,7 @@ ES6 API 的支持，详见如下表格部分（`x` 表示不支持，无特殊
 |String|iOS8|iOS9|iOS10|Android|
 |:-|:-|:-|:-|:-|
 |codePointAt|||||
-|normalize|x|x||x|
+|normalize|x|x||仅支持 NFD/NFC|
 |includes|||||
 |startsWith|||||
 |endsWith|||||