diff --git a/packages/meteor/helpers.js b/packages/meteor/helpers.js
index 0804eff775..7edd152bcc 100644
--- a/packages/meteor/helpers.js
+++ b/packages/meteor/helpers.js
@@ -84,7 +84,7 @@ _.extend(Meteor, {
       var logErr = function (err) {
         if (err)
           return Meteor._debug("Exception in callback of async function",
-                               err ? err.stack : err);
+                               err.stack ? err.stack : err);
       };
 
       // Pop off optional args that are undefined