diff --git a/koha-tmpl/opac-tmpl/bootstrap/en/modules/opac-messaging.tt b/koha-tmpl/opac-tmpl/bootstrap/en/modules/opac-messaging.tt
index 968630641c..fdd5571580 100644
--- a/koha-tmpl/opac-tmpl/bootstrap/en/modules/opac-messaging.tt
+++ b/koha-tmpl/opac-tmpl/bootstrap/en/modules/opac-messaging.tt
@@ -188,7 +188,7 @@
 
 function normalizeSMS(value){
   let has_plus = value.charAt(0) === '+';
-  let new_value = value.replace(/[^0-9]+/g, '');
+  let new_value = value.replace(/\D/g,'');
   if ( has_plus ) new_value = '+' + new_value;
   return new_value;
 }