diff --git a/layouts/joomla/form/field/radio/buttons.php b/layouts/joomla/form/field/radio/buttons.php
index 31109f41469d..3f33c3b66263 100644
--- a/layouts/joomla/form/field/radio/buttons.php
+++ b/layouts/joomla/form/field/radio/buttons.php
@@ -66,6 +66,8 @@
 
 if ($required) {
     $attribs[] = 'class="required radio"';
+} else {
+    $attribs[] = 'class="radio"';
 }
 
 if ($readonly || $disabled) {
diff --git a/layouts/joomla/form/field/radio/switcher.php b/layouts/joomla/form/field/radio/switcher.php
index 191a5a07850a..c517ab000334 100644
--- a/layouts/joomla/form/field/radio/switcher.php
+++ b/layouts/joomla/form/field/radio/switcher.php
@@ -62,7 +62,7 @@
  */
 $input = '<input type="radio" id="%1$s" name="%2$s" value="%3$s" %4$s>';
 
-$attr = 'id="' . $id . '"';
+$attr = 'id="' . $id . '" class="radio"';
 $attr .= $onchange ? ' onchange="' . $onchange . '"' : '';
 $attr .= $dataAttribute;