diff --git a/src/class/bth/bth_device.c b/src/class/bth/bth_device.c
index 09fab953e..b73f829cc 100755
--- a/src/class/bth/bth_device.c
+++ b/src/class/bth/bth_device.c
@@ -221,7 +221,7 @@ bool btd_control_xfer_cb(uint8_t rhport, uint8_t stage, tusb_control_request_t c
     // Handle class request only
     TU_VERIFY(request->bmRequestType_bit.type == TUSB_REQ_TYPE_CLASS);
 
-    if (tud_bt_hci_cmd_cb) tud_bt_hci_cmd_cb(&_btd_itf.hci_cmd, request->wLength);
+    if (tud_bt_hci_cmd_cb) tud_bt_hci_cmd_cb(&_btd_itf.hci_cmd, tu_min16(request->wLength, sizeof(_btd_itf.hci_cmd)));
   }
 
   return true;