diff --git a/spec.html b/spec.html
index 39ac4c72c79..70d227462aa 100644
--- a/spec.html
+++ b/spec.html
@@ -29185,7 +29185,6 @@ <h2>Syntax</h2>
         RegExpIdentifierPart[U] ::
           UnicodeIDContinue
           `$`
-          `_`
           `\` RegExpUnicodeEscapeSequence[?U]
           &lt;ZWNJ&gt;
           &lt;ZWJ&gt;