diff --git a/uc_role/src/Form/RoleFeatureForm.php b/uc_role/src/Form/RoleFeatureForm.php
index 45928dc..6d68519 100644
--- a/uc_role/src/Form/RoleFeatureForm.php
+++ b/uc_role/src/Form/RoleFeatureForm.php
@@ -309,7 +309,7 @@ class RoleFeatureForm extends FormBase {
       $product_role[$property] = $product_role[$property] === NULL ? 0 : $product_role[$property];
     }
 
-    if (!isset($product_role['rpid'])) {
+    if (empty($product_role['rpid'])) {
       $product_role['rpid'] = db_insert('uc_roles_products')
         ->fields($product_role)
         ->execute();