diff --git a/lib/Pool.js b/lib/Pool.js
index 7c5400d5f..391b90968 100644
--- a/lib/Pool.js
+++ b/lib/Pool.js
@@ -110,7 +110,7 @@ Pool.prototype.end = function (cb) {
   }.bind(this);
 
   if (this._allConnections.length === 0) {
-    return endCB();
+    return process.nextTick(endCB);
   }
 
   for (var i = 0; i < this._allConnections.length; i++) {