diff --git a/addons/website/static/src/snippets/s_image_gallery/options.js b/addons/website/static/src/snippets/s_image_gallery/options.js
index e796b5a16d3..22e84298c20 100644
--- a/addons/website/static/src/snippets/s_image_gallery/options.js
+++ b/addons/website/static/src/snippets/s_image_gallery/options.js
@@ -205,10 +205,10 @@ options.registry.gallery = options.Class.extend({
     mode: function (previewMode, widgetValue, params) {
         widgetValue = widgetValue || 'slideshow'; // FIXME should not be needed
         this.$target.css('height', '');
-        this[widgetValue]();
         this.$target
             .removeClass('o_nomode o_masonry o_grid o_slideshow')
             .addClass('o_' + widgetValue);
+        this[widgetValue]();
         this.trigger_up('cover_update');
     },
     /**