diff --git a/lib/cartodb/models/dataview/formula.js b/lib/cartodb/models/dataview/formula.js
index ba6725e3..efaeb0c6 100644
--- a/lib/cartodb/models/dataview/formula.js
+++ b/lib/cartodb/models/dataview/formula.js
@@ -30,7 +30,7 @@ const formulaQueryTpl = ctx => `
     ${ctx._isFloatColumn && ctx._operation !== 'count' ? `${filterOutSpecialNumericValuesTpl(ctx)}` : ''}
 `;
 
-var VALID_OPERATIONS = {
+const VALID_OPERATIONS = {
     count: true,
     avg: true,
     sum: true,
@@ -38,7 +38,7 @@ var VALID_OPERATIONS = {
     max: true
 };
 
-var TYPE = 'formula';
+const TYPE = 'formula';
 
 /**
  {