diff --git a/themes/default/js/product.js b/themes/default/js/product.js
index 2ea7f296d..5cd19f406 100644
--- a/themes/default/js/product.js
+++ b/themes/default/js/product.js
@@ -529,7 +529,7 @@ $(document).ready(function()
 	//set jqZoom parameters if needed
 	if (typeof(jqZoomEnabled) != 'undefined' && jqZoomEnabled)
 	{
-		$('#bigpic').attr('rel', $('#bigpic').attr('src').replace('thickbox', 'large'));
+		$('#bigpic').attr('rel', $('#bigpic').attr('src').replace('large', 'thickbox'));
 		$('img.jqzoom').jqueryzoom({
 			xzoom: 200, //zooming div default width(default width value is 200)
 			yzoom: 200, //zooming div default width(default height value is 200)