diff --git a/themes/bootstrap3/js/facets.js b/themes/bootstrap3/js/facets.js
index 649890d761bbaf8b1a78062540192f286a4d1e78..29573565242720c566573ed3228552e7d05faea3 100644
--- a/themes/bootstrap3/js/facets.js
+++ b/themes/bootstrap3/js/facets.js
@@ -129,7 +129,7 @@ VuFind.register('lightbox_facets', function LightboxFacets() {
     lightboxFacetSorting();
     $('.js-facet-next-page').click(function facetLightboxMore() {
       var button = $(this);
-      var page = parseInt(button.data('page'), 10);
+      var page = parseInt(button.attr('data-page'), 10);
       if (button.attr('disabled')) {
         return false;
       }