diff --git a/koha-tmpl/intranet-tmpl/prog/js/letter.js b/koha-tmpl/intranet-tmpl/prog/js/letter.js
index 76b2d497fe..53ac7b120e 100644
--- a/koha-tmpl/intranet-tmpl/prog/js/letter.js
+++ b/koha-tmpl/intranet-tmpl/prog/js/letter.js
@@ -197,7 +197,7 @@ $(document).ready(function() {
 
         if($(myListBox).find('option').length > 0) {
             $(myListBox).find('option').each( function (){
-                if ( $(this).attr('selected') && $(this).val().length > 0 ) {
+                if ( $(this).prop('selected') && $(this).val().length > 0 ) {
                     $(myQuery).insertAtCaret("<<" + $(this).val() + ">>");
                 }
             });