diff --git a/autoload/admin/factory/class.ShopProduct.php b/autoload/admin/factory/class.ShopProduct.php
index 7437b8d..c372c3f 100644
--- a/autoload/admin/factory/class.ShopProduct.php
+++ b/autoload/admin/factory/class.ShopProduct.php
@@ -263,7 +263,7 @@ class ShopProduct
     {
       $product = \shop\Product::getFromCache( $product_id, $lang_id );
 
-      if ( count( $product -> product_combinations ) )
+      if ( is_array( $product -> product_combinations ) and count( $product -> product_combinations ) )
       {
         foreach ( $product -> product_combinations as $product_combination )
         {