1 files changed, 4 insertions, 1 deletions
diff --git a/libmaple/usart.h b/libmaple/usart.h
index 0ad1405..e747e65 100644
--- a/libmaple/usart.h
+++ b/libmaple/usart.h
@@ -237,7 +237,10 @@ typedef struct usart_dev {
     usart_reg_map *regs;             /**< Register map */
     ring_buffer *rb;                 /**< RX ring buffer */
     uint32 max_baud;                 /**< Maximum baud */
-    uint8 rx_buf[USART_RX_BUF_SIZE]; /**< Actual RX buffer used by rb */
+    uint8 rx_buf[USART_RX_BUF_SIZE]; /**< @brief Deprecated.
+                                      * Actual RX buffer used by rb.
+                                      * This field will be removed in
+                                      * a future release. */
     rcc_clk_id clk_id;               /**< RCC clock information */
     nvic_irq_num irq_num;            /**< USART NVIC interrupt */
 } usart_dev;