diff --git a/src/device/usbd.c b/src/device/usbd.c
index 072b5e45..2946eff9 100644
--- a/src/device/usbd.c
+++ b/src/device/usbd.c
@@ -86,12 +86,12 @@ TU_ATTR_WEAK void tud_suspend_cb(bool remote_wakeup_en) {
 TU_ATTR_WEAK void tud_resume_cb(void) {
 }
 
-TU_ATTR_WEAK bool tud_vendor_control_xfer_cb(uint8_t rhport, uint8_t stage, tusb_control_request_t const* request) {
-  (void) rhport;
-  (void) stage;
-  (void) request;
-  return false;
-}
+//TU_ATTR_WEAK bool tud_vendor_control_xfer_cb(uint8_t rhport, uint8_t stage, tusb_control_request_t const* request) {
+//  (void) rhport;
+//  (void) stage;
+//  (void) request;
+//  return false;
+//}
 
 TU_ATTR_WEAK bool dcd_deinit(uint8_t rhport) {
   (void) rhport;
@@ -715,6 +715,7 @@ static bool process_control_request(uint8_t rhport, tusb_control_request_t const
 
   // Vendor request
   if ( p_request->bmRequestType_bit.type == TUSB_REQ_TYPE_VENDOR ) {
+    TU_VERIFY(tud_vendor_control_xfer_cb);
     usbd_control_set_complete_callback(tud_vendor_control_xfer_cb);
     return tud_vendor_control_xfer_cb(rhport, CONTROL_STAGE_SETUP, p_request);
   }
diff --git a/src/device/usbd.h b/src/device/usbd.h
index 94cae04a..478b1a70 100644
--- a/src/device/usbd.h
+++ b/src/device/usbd.h
@@ -159,7 +159,7 @@ void tud_event_hook_cb(uint8_t rhport, uint32_t eventid, bool in_isr);
 void tud_sof_cb(uint32_t frame_count);
 
 // Invoked when received control request with VENDOR TYPE
-bool tud_vendor_control_xfer_cb(uint8_t rhport, uint8_t stage, tusb_control_request_t const * request);
+TU_ATTR_WEAK bool tud_vendor_control_xfer_cb(uint8_t rhport, uint8_t stage, tusb_control_request_t const * request);
 
 //--------------------------------------------------------------------+
 // Binary Device Object Store (BOS) Descriptor Templates