1 files changed, 3 insertions, 4 deletions
diff --git a/lib/auto.js b/lib/auto.js
index 0175fda..e7f8813 100644
--- a/lib/auto.js
+++ b/lib/auto.js
@@ -1,7 +1,6 @@
 import noop from './internal/noop';
 
 import forOwn from './internal/forOwn';
-import slice from './internal/slice';
 import once from './internal/once';
 import onlyOnce from './internal/onlyOnce';
 import wrapAsync from './internal/wrapAsync';
@@ -188,14 +187,14 @@ export default function (tasks, concurrency, callback) {
     function runTask(key, task) {
         if (hasError) return;
 
-        var taskCallback = onlyOnce(function(err, result) {
+        var taskCallback = onlyOnce(function(err, ...result) {
             runningTasks--;
             if (err === false) {
                 canceled = true
                 return
             }
-            if (arguments.length > 2) {
-                result = slice(arguments, 1);
+            if (result.length < 2) {
+                result = result[0];
             }
             if (err) {
                 var safeResults = {};