diff --git a/src/function/reportActivity.js b/src/function/reportActivity.js
index f070fc4..eeec2b4 100644
--- a/src/function/reportActivity.js
+++ b/src/function/reportActivity.js
@@ -21,9 +21,9 @@ function resetFormAddRaMaterial() {
     $('#btn_add_ra_material').prop("disabled", false);
 }
 
-var qty = document.getElementById('volume_pekerjaan_material'); 
-        qty.addEventListener('keyup', function (e) { 
-        qty.value = formatRibuanInput(this.value); 
+var qtyActual = document.getElementById('volume_pekerjaan_material'); 
+        qtyActual.addEventListener('keyup', function (e) { 
+        qtyActual.value = formatRibuanInput(this.value); 
     });
 
 $(document).ready(function () {