diff --git a/loader/fixups.c b/loader/fixups.c
index cf5e60cd..7b320deb 100644
--- a/loader/fixups.c
+++ b/loader/fixups.c
@@ -39,6 +39,17 @@ SYS_INIT(disable_bootloader_mpu, PRE_KERNEL_1, CONFIG_KERNEL_INIT_PRIORITY_DEFAU
 SYS_INIT(disable_mpu_rasr_xn, PRE_KERNEL_1, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
 #endif
 
+#if defined(CONFIG_SOC_STM32H747XX_M7)
+int enable_bkp_access(void)
+{
+	/* Enable access to the backup domain */
+	// HAL_PWR_EnableBkUpAccess();
+	SET_BIT(PWR->CR1, PWR_CR1_DBP);
+	return 0;
+}
+SYS_INIT(enable_bkp_access, POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
+#endif
+
 #if defined(CONFIG_BOARD_ARDUINO_GIGA_R1) && defined(CONFIG_VIDEO)
 #include <zephyr/kernel.h>
 #include <zephyr/device.h>
diff --git a/variants/arduino_giga_r1_stm32h747xx_m7/arduino_giga_r1_stm32h747xx_m7.conf b/variants/arduino_giga_r1_stm32h747xx_m7/arduino_giga_r1_stm32h747xx_m7.conf
index 8ad58579..f0e58cdd 100644
--- a/variants/arduino_giga_r1_stm32h747xx_m7/arduino_giga_r1_stm32h747xx_m7.conf
+++ b/variants/arduino_giga_r1_stm32h747xx_m7/arduino_giga_r1_stm32h747xx_m7.conf
@@ -64,3 +64,5 @@ CONFIG_CYW4343W_MURATA_1DX=y
 CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2048
 CONFIG_BT_RX_STACK_SIZE=4096
 CONFIG_BT_HCI_TX_STACK_SIZE=4096
+
+CONFIG_STM32H7_BOOT_M4_AT_INIT=n
diff --git a/variants/arduino_opta_stm32h747xx_m7/arduino_opta_stm32h747xx_m7.conf b/variants/arduino_opta_stm32h747xx_m7/arduino_opta_stm32h747xx_m7.conf
index 8aac2859..ff80cd3e 100644
--- a/variants/arduino_opta_stm32h747xx_m7/arduino_opta_stm32h747xx_m7.conf
+++ b/variants/arduino_opta_stm32h747xx_m7/arduino_opta_stm32h747xx_m7.conf
@@ -90,3 +90,4 @@ CONFIG_MBEDTLS_SSL_MAX_CONTENT_LEN=7168
 CONFIG_MBEDTLS_HASH_ALL_ENABLED=y
 CONFIG_MBEDTLS_CMAC=y
 
+CONFIG_STM32H7_BOOT_M4_AT_INIT=n