diff --git a/cara/apps/calculator/static/js/form.js b/cara/apps/calculator/static/js/form.js
index a15f403f..9fc382ec 100644
--- a/cara/apps/calculator/static/js/form.js
+++ b/cara/apps/calculator/static/js/form.js
@@ -133,14 +133,17 @@ function require_recurrent_event(option) {
 
 function require_lunch(option) {
   $("#lunch_start").prop('required', option);
-  $("#mask_ffp2").prop('required', option);
 }
 
 function require_lunch(option) {
-  $("#mask_type1").prop('required', option);
   $("#lunch_finish").prop('required', option);
 }
 
+function require_mask(option) {
+  $("#mask_type1").prop('required', option);
+  $("#mask_ffp2").prop('required', option);
+}
+
 function require_hepa(option) {
   $("#hepa_amount").prop('required', option);
 }