diff --git a/www/modules/system/system.theme.css b/www/modules/system/system.theme.css
index 73cebee..e94cea7 100644
--- a/www/modules/system/system.theme.css
+++ b/www/modules/system/system.theme.css
@@ -113,6 +113,11 @@ input.form-radio {
   border: 2px solid red;
 }
 
+.form-item input[type="checkbox"].error, .form-item input[type="radio"].error{
+  outline: 2px solid red;
+  -moz-appearance: none;
+}
+
 /**
  * Inline items.
  */