diff --git a/lib/async.js b/lib/async.js
index 1f1e0effa..198e0b5fb 100644
--- a/lib/async.js
+++ b/lib/async.js
@@ -272,7 +272,7 @@
                         return callback(null);
                     } else {
                         if (sync) {
-                            async.nextTick(iterate);
+                            async.setImmediate(iterate);
                         } else {
                             iterate();
                         }
@@ -1048,7 +1048,7 @@
             var callback = args.pop();
             var key = hasher.apply(null, args);
             if (key in memo) {
-                async.nextTick(function () {
+                async.setImmediate(function () {
                     callback.apply(null, memo[key]);
                 });
             }