diff --git a/lib/Connection.js b/lib/Connection.js
index 356e085..4671982 100644
--- a/lib/Connection.js
+++ b/lib/Connection.js
@@ -243,7 +243,7 @@ Connection.prototype.serverSupports = function(cap) {
 Connection.prototype.destroy = function() {
   this._queue = [];
   this._curReq = undefined;
-  this._sock.destroy();
+  this._sock && this._sock.destroy();
 };
 
 Connection.prototype.end = function() {