diff --git a/lib/standards/aria-roles.js b/lib/standards/aria-roles.js
index c6c0f67c4e..f26c9428d4 100644
--- a/lib/standards/aria-roles.js
+++ b/lib/standards/aria-roles.js
@@ -378,7 +378,7 @@ const ariaRoles = {
     type: 'widget',
     requiredContext: ['menu', 'menubar', 'group'],
     requiredAttrs: ['aria-checked'],
-    allowedAttrs: ['aria-posinset', 'aria-readonly', 'aria-setsize'],
+    allowedAttrs: ['aria-expanded', 'aria-posinset', 'aria-readonly', 'aria-setsize'],
     superclassRole: ['checkbox', 'menuitem'],
     accessibleNameRequired: true,
     nameFromContent: true,
@@ -388,7 +388,7 @@ const ariaRoles = {
     type: 'widget',
     requiredContext: ['menu', 'menubar', 'group'],
     requiredAttrs: ['aria-checked'],
-    allowedAttrs: ['aria-posinset', 'aria-readonly', 'aria-setsize'],
+    allowedAttrs: ['aria-expanded', 'aria-posinset', 'aria-readonly', 'aria-setsize'],
     superclassRole: ['menuitemcheckbox', 'radio'],
     accessibleNameRequired: true,
     nameFromContent: true,
diff --git a/test/integration/rules/aria-allowed-attr/passes.html b/test/integration/rules/aria-allowed-attr/passes.html
index 9bee42b07c..979f75979e 100644
--- a/test/integration/rules/aria-allowed-attr/passes.html
+++ b/test/integration/rules/aria-allowed-attr/passes.html
@@ -1033,6 +1033,7 @@
   aria-live="value"
   aria-owns="value"
   aria-relevant="value"
+  aria-expanded="value"
 >
   ok
 </div>
@@ -1064,6 +1065,7 @@
   aria-live="value"
   aria-owns="value"
   aria-relevant="value"
+  aria-expanded="value"
 >
   ok
 </div>