diff --git a/ports/stm32/boards/NUCLEO_H743ZI/mpconfigboard.h b/ports/stm32/boards/NUCLEO_H743ZI/mpconfigboard.h
index d2a34795e7c1a3e20b6644e4d0f7926d0b66195a..d23c5bab04cdaded20873c1afef1631ce2ce29ce 100644
--- a/ports/stm32/boards/NUCLEO_H743ZI/mpconfigboard.h
+++ b/ports/stm32/boards/NUCLEO_H743ZI/mpconfigboard.h
@@ -2,6 +2,7 @@
 #define MICROPY_HW_MCU_NAME         "STM32H743"
 
 #define MICROPY_HW_ENABLE_RTC       (1)
+#define MICROPY_HW_ENABLE_RNG       (1)
 #define MICROPY_HW_ENABLE_ADC       (0)
 #define MICROPY_HW_ENABLE_DAC       (1)
 #define MICROPY_HW_ENABLE_USB       (1)