diff --git a/lib/q.js b/lib/q.js
index 4236752e..18dbcffb 100644
--- a/lib/q.js
+++ b/lib/q.js
@@ -281,6 +281,8 @@ function ref(object) {
         },
         "post": function (name /*...args*/) {
             var args = Array.prototype.slice.call(arguments, 1);
+            if (object === undefined || object === null)
+                return reject("" + object + " has no methods");
             var method = object[name];
             if (!method)
                 return reject("No such method " + name + " on object " + object);