From 403b5f0bc54476bec21fa83b0387ee2d970c5de4 Mon Sep 17 00:00:00 2001
From: zepumph <michael.kauzmann@colorado.edu>
Date: Thu, 18 Apr 2019 18:17:50 -0800
Subject: [PATCH] fix assertion, #222

---
 js/Action.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/js/Action.js b/js/Action.js
index 347c7dc8..49b19a97 100644
--- a/js/Action.js
+++ b/js/Action.js
@@ -120,7 +120,7 @@ define( require => {
         !phetioTypeSupplied && Object.freeze( options.validators );
       }
 
-      assert && assert( typeof this._action === 'function', 'action should be a function' );
+      assert && assert( typeof action === 'function', 'action should be a function' );
 
       // @private {function}
       this._action = action;