diff --git a/js/buttons/RadioButtonGroup.js b/js/buttons/RadioButtonGroup.js
index dfb4f127..902c6915 100644
--- a/js/buttons/RadioButtonGroup.js
+++ b/js/buttons/RadioButtonGroup.js
@@ -55,6 +55,7 @@ define( function( require ) {
       // a11y
       tagName: 'ul',
       labelTagName: 'h3',
+      ariaRole: 'radiogroup',
       groupFocusHighlight: true
     }, options );