diff --git a/firmware/config/boards/s105/board.mk b/firmware/config/boards/s105/board.mk
index 037277c7b5..7c56da135d 100644
--- a/firmware/config/boards/s105/board.mk
+++ b/firmware/config/boards/s105/board.mk
@@ -30,7 +30,8 @@ DDEFS += -DEFI_FILE_LOGGING=FALSE
 USE_FATFS = no
 
 # debug console
-DDEFS += -DTS_PRIMARY_UxART_PORT=SD1
+DDEFS += -DSTM32_UART_USE_USART1=TRUE
+DDEFS += -DTS_PRIMARY_UxART_PORT=UARTD1
 DDEFS += -DEFI_CONSOLE_TX_BRAIN_PIN=Gpio::A9 -DEFI_CONSOLE_RX_BRAIN_PIN=Gpio::A10
 
 DDEFS += -DFIRMWARE_ID=\"s105\"