diff --git a/lib/async.js b/lib/async.js
index cfb3691c..59384335 100644
--- a/lib/async.js
+++ b/lib/async.js
@@ -8065,7 +8065,11 @@
           task = tasks[taskIndex];
           while (++index < size) {
             if (workersList[index] === task) {
-              workersList.splice(index, 1);
+              if (index === 0) {
+                workersList.shift();
+              } else {
+                workersList.splice(index, 1);
+              }
               index = size;
               size--;
             }