diff --git a/lib/propobj.js b/lib/propobj.js
index 33c81b2..42e7c6b 100644
--- a/lib/propobj.js
+++ b/lib/propobj.js
@@ -87,10 +87,11 @@ exports.setup = function( dest, properties, methods )
 /**
  * Set up destination object by copying over properties and methods
  *
- * @param  {Object}   dest           destination object
- * @param  {Object}   properties     properties to copy
- * @param  {Object=}  methods        methods to copy
- * @param  {boolean}  unless_exists  do not set if method already exists in dest
+ * @param  {Object}   dest            destination object
+ * @param  {Object}   properties      properties to copy
+ * @param  {Object=}  methods         methods to copy
+ * @param  {boolean}  unless_keyword  do not set if keyword is set on existing
+ *                                    method
  *
  * @return  {undefined}
  */