diff --git a/modules/commerce_billy_pdf/commerce_billy_pdf.module b/modules/commerce_billy_pdf/commerce_billy_pdf.module
index fec9d31..59d967c 100644
--- a/modules/commerce_billy_pdf/commerce_billy_pdf.module
+++ b/modules/commerce_billy_pdf/commerce_billy_pdf.module
@@ -140,6 +140,7 @@ function commerce_billy_pdf_preprocess_entity(&$variables) {
  * Page callback for invoice PDF.
  */
 function commerce_billy_pdf($order) {
+  $order->pdf_download = TRUE;
   $html = commerce_billy_pdf_html($order);
   $filename = preg_replace('/[^a-z0-9]/', '_', drupal_strtolower('invoice_' . $order->order_number)) . '.pdf';
 
@@ -228,6 +229,13 @@ function commerce_billy_pdf_commerce_order_view($order, $view_mode) {
     $order->content['invoice_logo'] = array(
       '#value' => variable_get('commerce_billy_pdf_logo', 'misc/druplicon.png'),
     );
+    if (empty($order->pdf_download)) {
+      $css_files = variable_get('commerce_billy_pdf_css_files', array(drupal_get_path('module', 'commerce_billy_pdf') . '/css/pdf.css'));
+      foreach ($css_files as $file) {
+        $order->content['#attached']['css'][] = $file;
+      }
+      $order->content['invoice_logo']['#value'] = '/' . $order->content['invoice_logo']['#value'];
+    }
   }
 }