diff --git a/index.js b/index.js
index 1c50116..5c4460a 100644
--- a/index.js
+++ b/index.js
@@ -133,6 +133,7 @@ Agent.prototype.addRequest = function addRequest(req, _opts) {
       // responsibility for this `req` to the Agent from here on
       socket.addRequest(req, opts);
     } else if (socket) {
+      socket.on('free', () => socket.destroy() ); // TODO reuse sockets
       req.onSocket(socket);
     } else {
       const err = new Error(