* \ingroup Group_PipeControlReq
*
* \param[in] BufferPtr Pointer to the start of the data buffer if the request has a data stage, or
- * NULL if the request transfers no data to or from the device.
+ * \c NULL if the request transfers no data to or from the device.
*
* \return A value from the \ref USB_Host_SendControlErrorCodes_t enum to indicate the result.
*/