diff --git a/src/main/vcp_hal/usbd_cdc_interface.c b/src/main/vcp_hal/usbd_cdc_interface.c
index 2489d74fb26..dbc093fb641 100644
--- a/src/main/vcp_hal/usbd_cdc_interface.c
+++ b/src/main/vcp_hal/usbd_cdc_interface.c
@@ -98,6 +98,10 @@ static int8_t CDC_Itf_Init(void);
 static int8_t CDC_Itf_DeInit(void);
 static int8_t CDC_Itf_Control(uint8_t cmd, uint8_t* pbuf, uint16_t length);
 static int8_t CDC_Itf_Receive(uint8_t* pbuf, uint32_t *Len);
+#if defined(STM32H7)
+static int8_t CDC_Itf_Transmit(uint8_t *pbuf, uint32_t *Len, uint8_t epnum);
+#endif
+
 
 static void TIM_Config(void);
 static void Error_Handler(void);
@@ -107,7 +111,10 @@ USBD_CDC_ItfTypeDef USBD_CDC_fops =
   CDC_Itf_Init,
   CDC_Itf_DeInit,
   CDC_Itf_Control,
-  CDC_Itf_Receive
+  CDC_Itf_Receive,
+#if defined(STM32H7)
+  CDC_Itf_Transmit
+#endif
 };
 
 
@@ -296,6 +303,29 @@ static int8_t CDC_Itf_Receive(uint8_t* Buf, uint32_t *Len)
     return (USBD_OK);
 }
 
+#if defined(STM32H7)
+/**
+  * @brief  CDC_Itf_Transmit
+  *         Data transmitted callback
+  *
+  *         @note
+  *         This function is IN transfer complete callback used to inform user that
+  *         the submitted Data is successfully sent over USB.
+  *
+  * @param  Buf: Buffer of data to be received
+  * @param  Len: Number of data received (in bytes)
+  * @retval Result of the operation: USBD_OK if all operations are OK else USBD_FAIL
+  */
+static int8_t CDC_Itf_Transmit(uint8_t *Buf, uint32_t *Len, uint8_t epnum)
+{
+  UNUSED(Buf);
+  UNUSED(Len);
+  UNUSED(epnum);
+
+  return (0);
+}
+#endif
+
 /**
   * @brief  TIM_Config: Configure TIMusb timer
   * @param  None.
@@ -387,7 +417,12 @@ uint32_t CDC_Send_FreeBytes(void)
  */
 uint32_t CDC_Send_DATA(const uint8_t *ptrBuffer, uint32_t sendLength)
 {
+#if defined(STM32H7)
+    USBD_CDC_HandleTypeDef *hcdc = (USBD_CDC_HandleTypeDef*)USBD_Device.pClassData;
+#else
     USBD_CDC_HandleTypeDef *hcdc = (USBD_CDC_HandleTypeDef*)USBD_Device.pCDC_ClassData;
+#endif
+
     while (hcdc->TxState != 0);
 
     for (uint32_t i = 0; i < sendLength; i++)
diff --git a/src/main/vcp_hal/usbd_conf_stm32h7xx.c b/src/main/vcp_hal/usbd_conf_stm32h7xx.c
index 40713f7a397..b80fa521f36 100644
--- a/src/main/vcp_hal/usbd_conf_stm32h7xx.c
+++ b/src/main/vcp_hal/usbd_conf_stm32h7xx.c
@@ -375,7 +375,7 @@ USBD_StatusTypeDef USBD_LL_Init(USBD_HandleTypeDef * pdev)
     hpcd.Instance = USB2_OTG_FS;
     hpcd.Init.dev_endpoints = 9;
     hpcd.Init.use_dedicated_ep1 = DISABLE;
-    hpcd.Init.ep0_mps = DEP0CTL_MPS_64;
+    hpcd.Init.ep0_mps = EP_MPS_64;
     hpcd.Init.low_power_enable = DISABLE;
     hpcd.Init.phy_itface = PCD_PHY_EMBEDDED;
     hpcd.Init.Sof_enable = DISABLE;
@@ -592,7 +592,7 @@ USBD_StatusTypeDef USBD_LL_SetUSBAddress(USBD_HandleTypeDef * pdev,
  */
 USBD_StatusTypeDef USBD_LL_Transmit(USBD_HandleTypeDef * pdev,
         uint8_t ep_addr,
-        uint8_t * pbuf, uint16_t size)
+        uint8_t * pbuf, uint32_t size)
 {
     /* Get the packet total length */
     pdev->ep_in[ep_addr & 0x7F].total_length = size;
@@ -611,7 +611,7 @@ USBD_StatusTypeDef USBD_LL_Transmit(USBD_HandleTypeDef * pdev,
  */
 USBD_StatusTypeDef USBD_LL_PrepareReceive(USBD_HandleTypeDef * pdev,
         uint8_t ep_addr,
-        uint8_t * pbuf, uint16_t size)
+        uint8_t * pbuf, uint32_t size)
 {
     HAL_PCD_EP_Receive(pdev->pData, ep_addr, pbuf, size);
     return USBD_OK;