diff --git a/js/custom.js b/js/custom.js
index 08689e5..d6dd53f 100644
--- a/js/custom.js
+++ b/js/custom.js
@@ -3,8 +3,18 @@
     attach: function (context) {
       function processField(id) {
         var el = document.getElementById(id);
-        if (!el || el.value === "") return;
-        el.value = parseInt(el.value, 10);
+        if (!el) return;
+
+        // If value isn't populated yet, wait and retry once
+        if (el.value === "") {
+          setTimeout(function () {
+            processField(id);
+          }, 100);
+          return;
+        }
+
+        var str = el.value.toString().slice(0, -3);
+        el.value = parseInt(str, 10);
       }
 
       once("from-slider", "#nouislider-input-from", context).forEach(