diff --git a/lib/chai/core/assertions.js b/lib/chai/core/assertions.js
index 9ca0b0cd7..90c4a6984 100644
--- a/lib/chai/core/assertions.js
+++ b/lib/chai/core/assertions.js
@@ -34,6 +34,7 @@ module.exports = function (chai, _) {
    * - of
    * - same
    * - but
+   * - does
    *
    * @name language chains
    * @namespace BDD
@@ -43,7 +44,7 @@ module.exports = function (chai, _) {
   [ 'to', 'be', 'been'
   , 'is', 'and', 'has', 'have'
   , 'with', 'that', 'which', 'at'
-  , 'of', 'same', 'but' ].forEach(function (chain) {
+  , 'of', 'same', 'but', 'does' ].forEach(function (chain) {
     Assertion.addProperty(chain);
   });
 
diff --git a/test/expect.js b/test/expect.js
index ba8590e81..99d80de94 100644
--- a/test/expect.js
+++ b/test/expect.js
@@ -31,7 +31,7 @@ describe('expect', function () {
     [ 'to', 'be', 'been'
     , 'is', 'and', 'has', 'have'
     , 'with', 'that', 'which', 'at'
-    , 'of', 'same', 'but' ].forEach(test);
+    , 'of', 'same', 'but', 'does' ].forEach(test);
   });
 
   it('fail', function () {
diff --git a/test/should.js b/test/should.js
index efbc149a8..37a4876a7 100644
--- a/test/should.js
+++ b/test/should.js
@@ -28,7 +28,7 @@ describe('should', function() {
     [ 'to', 'be', 'been'
     , 'is', 'and', 'has', 'have'
     , 'with', 'that', 'which', 'at'
-    , 'of', 'same', 'but' ].forEach(test);
+    , 'of', 'same', 'but', 'does' ].forEach(test);
   });
 
   it('fail', function () {