diff --git a/sites/all/modules/contrib/inline_entity_form/includes/commerce_product.inline_entity_form.inc b/sites/all/modules/contrib/inline_entity_form/includes/commerce_product.inline_entity_form.inc
index 07b5724..9e7fd0c 100644
--- a/sites/all/modules/contrib/inline_entity_form/includes/commerce_product.inline_entity_form.inc
+++ b/sites/all/modules/contrib/inline_entity_form/includes/commerce_product.inline_entity_form.inc
@@ -172,7 +172,7 @@ class CommerceProductInlineEntityFormController extends EntityInlineEntityFormCo
       '#maxlength' => 255,
       '#required' => TRUE,
       '#fieldset' => 'product_details',
-      '#weight' => $extra_fields['sku']['weight'],
+      '#weight' => isset($extra_fields['sku']['weight']) ? $extra_fields['sku']['weight'] : NULL,
     );
     $entity_form['title'] = array(
       '#type' => 'textfield',
@@ -191,7 +191,7 @@ class CommerceProductInlineEntityFormController extends EntityInlineEntityFormCo
       '#options' => array(1 => t('Active'), 0 => t('Disabled')),
       '#required' => TRUE,
       '#fieldset' => 'product_details',
-      '#weight' => $extra_fields['status']['weight'],
+      '#weight' => isset($extra_fields['status']['weight']) ? $extra_fields['status']['weight'] : NULL,
     );
 
     // Attach fields.