diff --git a/index.html b/index.html
index 2ba5ba258..9e37f80b0 100644
--- a/index.html
+++ b/index.html
@@ -870,7 +870,7 @@ <h2><abbr title="Accessible Rich Internet Applications">WAI-ARIA</abbr> Roles</h
           language semantics, there are no changes in the <abbr title="Document Object Model">DOM</abbr>, only in the <a class="termref">accessibility tree</a>.
         </p>
         <p>
-          User agents MUST use the first token in the sequence of tokens in the <a><code>role</code> attribute</a> value that matches the name of any non-abstract
+          User agents MUST use the first token in the sequence of tokens in the <a><code>role</code> attribute</a> value that is an [=ASCII case-insensitive=] match for the name of any non-abstract
           <abbr title="Accessible Internet Application">WAI-ARIA</abbr> <a>role</a>. Refer to the section on <a><code>role</code> attribute</a> implementation in
           <a href="#host_general_role">Host Languages</a> for further details.
         </p>
@@ -16352,7 +16352,7 @@ <h2><a>Role Attribute</a></h2>
             attribute value illegal in the host-language syntax; and
           </li>
           <li>
-            The first name literal of a non-abstract <abbr title="Accessible Rich Internet Applications">WAI-ARIA</abbr> role in the list of tokens in the <a><code>role</code> attribute</a> defines
+            The first [=ASCII case-insensitive=] name literal of a non-abstract <abbr title="Accessible Rich Internet Applications">WAI-ARIA</abbr> role in the list of tokens in the <a><code>role</code> attribute</a> defines
             the role according to which the user agent MUST process the element. User Agent processing for roles is defined in the
             <cite><a href="" class="core-mapping">Core Accessibility API Mappings</a></cite> [[CORE-AAM-1.2]].
           </li>