diff --git a/helpers/isNegativeZero.js b/helpers/isNegativeZero.js
index 045b36ad..5df5abb4 100644
--- a/helpers/isNegativeZero.js
+++ b/helpers/isNegativeZero.js
@@ -1,5 +1,5 @@
 'use strict';
 
-module.exports = function isNegativeZero(x) {
-	return x === 0 && 1 / x === 1 / -0;
-};
+var isNegativeZero = require('is-negative-zero');
+
+module.exports = isNegativeZero;