diff --git a/os/hal/boards/WVSHARE_BLE400/board.h b/os/hal/boards/WVSHARE_BLE400/board.h
index 536b7f68..617a0b57 100644
--- a/os/hal/boards/WVSHARE_BLE400/board.h
+++ b/os/hal/boards/WVSHARE_BLE400/board.h
@@ -34,6 +34,8 @@
 #define LED4           22
 #define UART_TX        9
 #define UART_RX        11
+#define UART_RTS       8
+#define UART_CTS       10
 #define SPI_SCK        25
 #define SPI_MOSI       24
 #define SPI_MISO       23