diff --git a/ports/stm32/boards/PYBD_SF2/mpconfigboard.h b/ports/stm32/boards/PYBD_SF2/mpconfigboard.h
index a46b5ca5bc..215b3f4016 100644
--- a/ports/stm32/boards/PYBD_SF2/mpconfigboard.h
+++ b/ports/stm32/boards/PYBD_SF2/mpconfigboard.h
@@ -44,6 +44,7 @@
 #define MICROPY_BOARD_ENTER_STOP    board_sleep(1);
 #define MICROPY_BOARD_LEAVE_STOP    board_sleep(0);
 #define MICROPY_BOARD_ENTER_STANDBY board_sleep(1);
+#define MICROPY_BOARD_SDCARD_POWER  mp_hal_pin_high(pyb_pin_EN_3V3);
 void board_early_init(void);
 void board_sleep(int value);