diff --git a/sections/semantics-tabular-data.include b/sections/semantics-tabular-data.include
index 4154bb8261..379524860c 100644
--- a/sections/semantics-tabular-data.include
+++ b/sections/semantics-tabular-data.include
@@ -1359,7 +1359,8 @@
     <dd><code>headers</code> - The header cells for this cell</dd>
     <dt>[=Allowed ARIA role attribute values=]:</dt>
     <dd>
-      <a attr-value for="aria/role"><code>cell</code></a> role (default - <a><em>do not set</em></a>)
+      <a attr-value for="aria/role"><code>cell</code></a>,
+      <a attr-value for="aria/role"><code>gridcell</code></a> role (each are default - <a><em>do not set</em></a>)
       or
       <a href="#allowed-aria-roles-states-and-properties">Any other role value</a>.
     </dd>
@@ -1429,7 +1430,9 @@
     <dt>[=Allowed ARIA role attribute values=]:</dt>
     <dd>
       <a attr-value for="aria/role"><code>columnheader</code></a>,
-      <a attr-value for="aria/role"><code>rowheader</code></a> role (each are default - <a><em>do not set</em></a>)
+      <a attr-value for="aria/role"><code>rowheader</code></a>,
+      <a attr-value for="aria/role"><code>cell</code></a>,
+      <a attr-value for="aria/role"><code>gridcell</code></a> role (each are default - <a><em>do not set</em></a>)
       or
       <a href="#allowed-aria-roles-states-and-properties">Any other role value</a>.</dd>
     <dt>[=Allowed ARIA state and property attributes=]:</dt>