diff --git a/classes/sc/class-sendpress-sc-forms.php b/classes/sc/class-sendpress-sc-forms.php
index 946d8a42..bb2866c3 100644
--- a/classes/sc/class-sendpress-sc-forms.php
+++ b/classes/sc/class-sendpress-sc-forms.php
@@ -491,9 +491,13 @@ private static function signup($options){
 								$label = $value['custom_field_label'];
 								$required = false;
 
-								if(filter_var(($options['_custom_field_'.$value['id'].'_required'] === 'on'), FILTER_VALIDATE_BOOLEAN) ){ 
+								if(array_key_exists('_custom_field_'.$value['id'].'_required', $options)) {
+									if(filter_var(($options['_custom_field_'.$value['id'].'_required'] === 'on'), FILTER_VALIDATE_BOOLEAN) ){
+
 									$label = '*'.$label;
 									$required = true;
+
+									}
 								}
 
 								?>