1 files changed, 2 insertions, 1 deletions
diff --git a/addons/website/static/src/snippets/s_image_gallery/000.js b/addons/website/static/src/snippets/s_image_gallery/000.js
index b86fbff652f..9bd0f8e39fd 100644
--- a/addons/website/static/src/snippets/s_image_gallery/000.js
+++ b/addons/website/static/src/snippets/s_image_gallery/000.js
@@ -124,7 +124,8 @@ const GallerySliderWidget = publicWidget.Widget.extend({
         }
 
         function update() {
-            index = $lis.index($lis.filter('.active')) || 0;
+            const active = $lis.filter('.active');
+            index = active.length ? $lis.index(active) : 0;
             page = Math.floor(index / realNbPerPage);
             hide();
         }