diff --git a/lib/ext/chain.js b/lib/ext/chain.js
index 58f5eeb..7b553d8 100644
--- a/lib/ext/chain.js
+++ b/lib/ext/chain.js
@@ -16,6 +16,7 @@ export default function(should, Assertion) {
    * @alias Assertion#of
    * @alias Assertion#a
    * @alias Assertion#and
+   * @alias Assertion#been
    * @alias Assertion#have
    * @alias Assertion#has
    * @alias Assertion#with
@@ -25,7 +26,7 @@ export default function(should, Assertion) {
    * @alias Assertion#it
    * @category assertion chaining
    */
-  ['an', 'of', 'a', 'and', 'be', 'has', 'have', 'with', 'is', 'which', 'the', 'it'].forEach(function(name) {
+  ['an', 'of', 'a', 'and', 'be', 'been', 'has', 'have', 'with', 'is', 'which', 'the', 'it'].forEach(function(name) {
     Assertion.addChain(name);
   });
 }