diff --git a/f4/usb/src/usb.c b/f4/usb/src/usb.c
index ba5887aaf84bf6ee75609ecabd37e7da8dc87d54..e79b5def6614a9d2750b8630587d631a0fb791b7 100644
--- a/f4/usb/src/usb.c
+++ b/f4/usb/src/usb.c
@@ -142,7 +142,6 @@ int8_t usb_cdc_receive(uint8_t* Buf, uint32_t *Len)
 {
   int i=0;
  
-  HAL_GPIO_WritePin(GPIOD,GPIO_PIN_14,GPIO_PIN_SET); 
 /* USER CODE BEGIN 6 */
   for(i=0;i<(*Len);i++)
   {
@@ -159,7 +158,6 @@ int8_t usb_cdc_receive(uint8_t* Buf, uint32_t *Len)
   }  
   USBD_CDC_SetRxBuffer(&USBHandle, &Buf[0]);
   USBD_CDC_ReceivePacket(&USBHandle);
-  HAL_GPIO_WritePin(GPIOD,GPIO_PIN_14,GPIO_PIN_RESET); 
 
   return (USBD_OK);
   /* USER CODE END 6 */