riot.is_equal.patch.js

diff --git a/riot.js b/riot.js
index 27e5162..fa0d017 100644
--- a/riot.js
+++ b/riot.js
@@ -491,7 +491,7 @@
           }
         }
       }
-      for (var key in a) {
+      for (var key in b) {
         if (!this.isEqual(a[key], b[key])) {
           return;
         }

riot.is_equal.test.js

Riot.context('Riot.Assertion', function() {
  given('isEqual()', function () {
    should('return falsy when an empty object is supplied as the first param', function() {
      return ! Riot.Assertion.prototype.isEqual({}, {a: 'a', b: 'b'});
    }).isTrue();
  });
});