diff --git a/cara/apps/calculator/static/js/form.js b/cara/apps/calculator/static/js/form.js
index 12086af1..5a20f025 100644
--- a/cara/apps/calculator/static/js/form.js
+++ b/cara/apps/calculator/static/js/form.js
@@ -239,8 +239,14 @@ function on_ventilation_type_change() {
 function on_wearing_mask_change() {
   wearing_mask = $('input[type=radio][name=mask_wearing_option]')
   wearing_mask.each(function (index) {
-    if (this.checked) getChildElement($(this)).show();
-    else getChildElement($(this)).hide();    
+    if (this.checked) {
+      getChildElement($(this)).show();
+      require_fields(this);
+    }
+    else {
+      getChildElement($(this)).hide();
+      require_fields(this);
+    }
   })
 }
 
diff --git a/cara/apps/calculator/templates/calculator.form.html.j2 b/cara/apps/calculator/templates/calculator.form.html.j2
index 92cd6b5e..9b73d9fd 100644
--- a/cara/apps/calculator/templates/calculator.form.html.j2
+++ b/cara/apps/calculator/templates/calculator.form.html.j2
@@ -260,9 +260,9 @@
     <br>
     
     <div class='sub_title'>Are masks worn when occupants are at workstations?</div>
-    <input type="radio" id="mask_on" name="mask_wearing_option" value="mask_on" data-enables="#DIVmasks_used" required>
+    <input type="radio" id="mask_on" name="mask_wearing_option" value="mask_on" data-enables="#DIVmasks_used">
       <label for="mask_on">Yes</label>
-    <input class="ml-2" type="radio" id="mask_off"  name="mask_wearing_option" value="mask_off" required checked="checked">
+    <input class="ml-2" type="radio" id="mask_off"  name="mask_wearing_option" value="mask_off" checked="checked">
       <label for="mask_off">No</label><br>
       
     <div id="DIVmasks_used" style="display:none">