diff --git a/themes/bootstrap3/js/lightbox.js b/themes/bootstrap3/js/lightbox.js
index f77231400d458addb278a8bcd52139e9d0260b40..5a6cb8f8f7dd461751cd6f53e0ff6b3bb9d18295 100644
--- a/themes/bootstrap3/js/lightbox.js
+++ b/themes/bootstrap3/js/lightbox.js
@@ -17,7 +17,7 @@ VuFind.lightbox = (function() {
       type = 'info';
     }
     _html('<div class="alert alert-'+type+'">'+message+'</div>\
-    <button class="btn btn-default" data-dismiss="modal">close</button>');
+    <button class="btn btn-default" data-dismiss="modal">' + VuFind.translate('close') + '</button>');
     _modal.modal('show');
   };
   var flashMessage = function(message, type) {