diff --git a/lib/executor.js b/lib/executor.js
index a555bd3..70ec590 100755
--- a/lib/executor.js
+++ b/lib/executor.js
@@ -31,6 +31,9 @@ function Executor () {
       };
 
       newArguments[newArguments.length - 1] = callback;
+    } else if (!lastArg && task.arguments.length) {
+        callback = function () { cb(); };
+        newArguments[newArguments.length - 1] = callback;
     } else {
       callback = function () { cb(); };
       newArguments.push(callback);