diff --git a/encoding.bs b/encoding.bs
index f321eea..eba8e27 100644
--- a/encoding.bs
+++ b/encoding.bs
@@ -1923,8 +1923,7 @@ consumers of content generated with <a>GBK</a>'s <a for=/>encoder</a>.
 
    <li><p>Unset the <a>EUC-JP jis0212 flag</a>.
 
-   <li><p>If <var>byte</var> is not in the range 0xA1 to 0xFE, inclusive,
-   <a>prepend</a> <var>byte</var> to
+   <li><p>If <var>byte</var> is an <a>ASCII byte</a>, <a>prepend</a> <var>byte</var> to
    <var>stream</var>.
 
    <li><p>If <var>code point</var> is null, return <a>error</a>.