diff --git a/lib/client.js b/lib/client.js
index a2c74583..08eb3115 100644
--- a/lib/client.js
+++ b/lib/client.js
@@ -48,7 +48,7 @@ Client.prototype.releaseConnection = function(connection) {
 };
 
 // Destroy the current connection pool for the client.
-Client.prototype.destroy = function() {
+Client.prototype.destroy = function(callback) {
   var pool = this.pool;
   var promise = new Promise(function(resolver, rejecter) {
     if (!pool) resolver();