diff --git a/boards/arm/stm32h7/nucleo-h743zi/include/board.h b/boards/arm/stm32h7/nucleo-h743zi/include/board.h
index 9d81594d7e..a60f6082fc 100644
--- a/boards/arm/stm32h7/nucleo-h743zi/include/board.h
+++ b/boards/arm/stm32h7/nucleo-h743zi/include/board.h
@@ -374,11 +374,17 @@
 #define GPIO_USART3_RX     GPIO_USART3_RX_3  /* PD9 */
 #define GPIO_USART3_TX     GPIO_USART3_TX_3  /* PD8 */
 
+#define DMAMAP_USART3_RX DMAMAP_DMA12_USART3RX_0
+#define DMAMAP_USART3_TX DMAMAP_DMA12_USART3TX_1
+
 /* USART6 (Arduino Serial Shield) */
 
 #define GPIO_USART6_RX     GPIO_USART6_RX_2  /* PG9 */
 #define GPIO_USART6_TX     GPIO_USART6_TX_2  /* PG14 */
 
+#define DMAMAP_USART6_RX DMAMAP_DMA12_USART6RX_1
+#define DMAMAP_USART6_TX DMAMAP_DMA12_USART6TX_0
+
 /* I2C1 Use Nucleo I2C1 pins */
 
 #define GPIO_I2C1_SCL GPIO_I2C1_SCL_2 /* PB8 - D15 */