diff --git a/lib/interface/should.js b/lib/interface/should.js
index <HASH>..<HASH> 100644
--- a/lib/interface/should.js
+++ b/lib/interface/should.js
@@ -45,7 +45,7 @@ module.exports = function () {
   should.not = {}
 
   should.not.equal = function (val1, val2) {
-    new Assertion(val).to.not.equal(val2);
+    new Assertion(val1).to.not.equal(val2);
   };
 
   should.not.throw = function (fn, err) {
type in should.not.equal