--- a/b2g/chrome/content/shell.js
+++ b/b2g/chrome/content/shell.js
@@ -395,16 +395,21 @@ Services.obs.addObserver(function onSyst
   let listener = {
     onSocketAccepted: function repl_acceptConnection(serverSocket, clientSocket) {
       dump('Accepted connection on ' + clientSocket.host + '\n');
       let input = clientSocket.openInputStream(Ci.nsITransport.OPEN_BLOCKING, 0, 0)
                               .QueryInterface(Ci.nsIAsyncInputStream);
       output = clientSocket.openOutputStream(Ci.nsITransport.OPEN_BLOCKING, 0, 0);
       output.write(prompt, prompt.length);
       input.asyncWait(reader, 0, 0, Services.tm.mainThread);
+    },
+    onStopListening: function repl_onStopListening() {
+      if (output) {
+        output.close();
+      }
     }
   }
   let serverPort = Services.prefs.getIntPref('b2g.remote-js.port');
   let serverSocket = Cc['@mozilla.org/network/server-socket;1']
                        .createInstance(Ci.nsIServerSocket);
   serverSocket.init(serverPort, true, -1);
   dump('Opened socket on ' + serverSocket.port + '\n');
   serverSocket.asyncListen(listener);