diff --git a/spec.html b/spec.html
index 3da56cc55a0..4c950d9e5ee 100644
--- a/spec.html
+++ b/spec.html
@@ -29691,6 +29691,11 @@ <h1>String.prototype.matchAll ( _regexp_ )</h1>
         <emu-alg>
           1. Let _O_ be ? RequireObjectCoercible(*this* value).
           1. If _regexp_ is neither *undefined* nor *null*, then
+            1. Let _isRegExp_ be ? IsRegExp(_regexp_).
+            1. If _isRegExp_ is true, then
+              1. Let _flags_ be ? Get(_regexp_, *"flags"*).
+              1. Perform ? RequireObjectCoercible(_flags_).
+              1. If ? ToString(_flags_) does not contain *"g"*, throw a *TypeError* exception.
             1. Let _matcher_ be ? GetMethod(_regexp_, @@matchAll).
             1. If _matcher_ is not *undefined*, then
               1. Return ? Call(_matcher_, _regexp_, &laquo; _O_ &raquo;).