diff --git a/hw/virtio-serial-bus.c b/hw/virtio-serial-bus.c
index 5df9b6b..8d77c94 100644
--- a/hw/virtio-serial-bus.c
+++ b/hw/virtio-serial-bus.c
@@ -190,8 +190,9 @@ int virtio_serial_close(VirtIOSerialPort *port)
 
     /*
      * If there's any data the guest sent which the app didn't
-     * consume, discard it.
+     * consume, reset the throttling flag and discard the data.
      */
+    port->throttled = false;
     flush_queued_data(port, true);
     return 0;
 }