diff --git a/ports/stm32/powerctrl.c b/ports/stm32/powerctrl.c
index 946185fba0..01ad183418 100644
--- a/ports/stm32/powerctrl.c
+++ b/ports/stm32/powerctrl.c
@@ -32,7 +32,11 @@
 
 #if defined(STM32H7)
 #define RCC_SR          RSR
+#if defined(STM32H743xx)
 #define RCC_SR_SFTRSTF  RCC_RSR_SFTRSTF
+#elif defined(STM32H747xx)
+#define RCC_SR_SFTRSTF  RCC_RSR_SFT2RSTF
+#endif
 #define RCC_SR_RMVF     RCC_RSR_RMVF
 #else
 #define RCC_SR          CSR