diff --git a/system/modules/isotope/templates/iso_gallery_zoom.html5 b/system/modules/isotope/templates/iso_gallery_zoom.html5
index b46f0f3d66..e6249ec56a 100644
--- a/system/modules/isotope/templates/iso_gallery_zoom.html5
+++ b/system/modules/isotope/templates/iso_gallery_zoom.html5
@@ -9,7 +9,7 @@
 <script>
 var zoom_<?php echo $this->product_id; ?>;
 window.addEvent('load', function(){ zoom_<?php echo $this->product_id; ?> = Isotope.zoomGallery(zoom_<?php echo $this->product_id; ?>, '<?php echo $this->large; ?>'); });
-window.addEvent('ajaxready', function(){ zoom_<?php echo $this->product_id; ?> = Isotope.zoomGallery(zoom_<?php echo $this->product_id; ?>, '<?php echo $this->large; ?>'); });
+window.addEvent('ajaxready', function(){ zoom_<?php echo $this->product_id; ?> = Isotope.zoomGallery(zoom_<?php echo $this->product_id; ?>, document.getElement('#<?php echo $this->name; ?>_mediumsize a.zoomImage').get('href')); });
 </script>
 <?php else: ?>
 <figure class="image_container"><div class="zoom"><a href="<?php echo $this->href_reader; ?>" class="zoomImage" title="<?php echo $this->desc; ?>"><img src="<?php echo $this->{$this->type}; ?>" alt="<?php echo $this->alt; ?>"<?php echo $this->{$this->type.'_size'}; ?>></a></div></figure>
diff --git a/system/modules/isotope/templates/iso_gallery_zoom.xhtml b/system/modules/isotope/templates/iso_gallery_zoom.xhtml
index 46e52b4e93..b1e7ae1a65 100644
--- a/system/modules/isotope/templates/iso_gallery_zoom.xhtml
+++ b/system/modules/isotope/templates/iso_gallery_zoom.xhtml
@@ -10,7 +10,7 @@
 <!--//--><![CDATA[//><!--
 var zoom_<?php echo $this->product_id; ?>;
 window.addEvent('load', function(){ zoom_<?php echo $this->product_id; ?> = Isotope.zoomGallery(zoom_<?php echo $this->product_id; ?>, '<?php echo $this->large; ?>'); });
-window.addEvent('ajaxready', function(){ zoom_<?php echo $this->product_id; ?> = Isotope.zoomGallery(zoom_<?php echo $this->product_id; ?>, '<?php echo $this->large; ?>'); });
+window.addEvent('ajaxready', function(){ zoom_<?php echo $this->product_id; ?> = Isotope.zoomGallery(zoom_<?php echo $this->product_id; ?>, document.getElement('#<?php echo $this->name; ?>_mediumsize a.zoomImage').get('href')); });
 //--><!]]>
 </script>
 <?php else: ?>