diff --git a/src/mtp_usb_driver_nuttx.c b/src/mtp_usb_driver_nuttx.c
index be0c074..b190f04 100644
--- a/src/mtp_usb_driver_nuttx.c
+++ b/src/mtp_usb_driver_nuttx.c
@@ -361,10 +361,12 @@ static void __handle_control_request(mtp_int32 request)
             sent_busy = FALSE;
         }
 
-        status = write(g_usb_ep0, &statusreq_data, sizeof(statusreq_data));
-        if (status < 0) {
-            ERR("IOCTL MTP_SEND_STATUS_ACK Failed [%d]\n",
-                errno);
+        if (_transport_get_mtp_operation_state() == MTP_STATE_ONSERVICE) {
+            status = write(g_usb_ep0, &statusreq_data, sizeof(statusreq_data));
+            if (status < 0) {
+                ERR("IOCTL MTP_SEND_STATUS_ACK Failed [%d]\n",
+                    errno);
+            }
         }
         break;