diff --git a/flexslider_fields/flexslider_fields.module b/flexslider_fields/flexslider_fields.module
index 8110a57..f67d4eb 100644
--- a/flexslider_fields/flexslider_fields.module
+++ b/flexslider_fields/flexslider_fields.module
@@ -212,12 +212,18 @@ function flexslider_fields_field_formatter_view($entity_type, $entity, $field, $
 
       // Use PhotoSwipe if needed
       if ($display['settings']['photoswipe']) {
-        $photoswipe_image_url = image_style_url($display['settings']['photoswipe_image_style'], $item['item']['uri']);
         $photoswipe_dimensions = array(
           'width' => $item['item']['width'],
           'height' => $item['item']['height'],
         );
-        image_style_transform_dimensions($display['settings']['photoswipe_image_style'], $photoswipe_dimensions);
+
+        if ($style_name = $display['settings']['photoswipe_image_style']) {
+          $photoswipe_image_url = image_style_url($style_name,$item['item']['uri']);
+          image_style_transform_dimensions($style_name, $photoswipe_dimensions);
+        } else {
+          $photoswipe_image_url = file_create_url($item['item']['uri']);
+        }
+
         $photoswipe_options = array(
           'html' => TRUE,
           'attributes' => array(