diff --git a/www/conservancy/static/supporter-page.js b/www/conservancy/static/supporter-page.js
index 7593ad830d7698f0307a62ae5bfd9ae1ab0d1c0e..d02b5dbc1185204030e43c021710d44e8ba655cd 100644
--- a/www/conservancy/static/supporter-page.js
+++ b/www/conservancy/static/supporter-page.js
@@ -32,6 +32,7 @@ $(document).ready(function() {
         $control.find('.toggle-content').slideUp("slow");
         $control.find('.toggle-content').slideDown("slow");
     });
+    $('#amount').addClass("valid");
     $('#amount').on('input', function() {
         var input=$(this);
         var value = input.val();