diff --git a/app/models/product_categories_block.rb b/app/models/product_categories_block.rb
index 3dff0f6..8ada9c8 100644
--- a/app/models/product_categories_block.rb
+++ b/app/models/product_categories_block.rb
@@ -17,7 +17,7 @@ class ProductCategoriesBlock < Block
     profile = owner
     proc do
       if @categories.nil? or @categories.length == 0
-        categories = ProductCategory.on_level().order(:name)
+        categories = ProductCategory.on_level(nil).order(:name)
         if @categories and @categories.length == 0
           notice = _('There are no sub-categories for %s') % @category.name
         end
--
libgit2 0.21.2