diff --git a/lib/sinon/behavior.js b/lib/sinon/behavior.js
index 42112d778..8ccd5b4fa 100644
--- a/lib/sinon/behavior.js
+++ b/lib/sinon/behavior.js
@@ -160,14 +160,6 @@ var proto = {
             "is not supported. Use \"stub.withArgs(...).onCall(...)\" " +
             "to define sequential behavior for calls with certain arguments."
         );
-    },
-
-    chain: function chain() {
-        /**
-         * "this" is stub when method is called directly on stub, e.g. stub.returns(123);
-         * "this.stub" exists when method is called from onCall chaining, e.g. stub.onCall(0).returns(123)
-         */
-        return this.stub || this;
     }
 };