diff --git a/boot/zephyr/arm_cleanup.c b/boot/zephyr/arm_cleanup.c
index a365926..c52c578 100644
--- a/boot/zephyr/arm_cleanup.c
+++ b/boot/zephyr/arm_cleanup.c
@@ -20,3 +20,15 @@
 		NVIC->ICPR[i] = 0xFFFFFFFF;
 	}
 }
+
+__weak void z_arm_clear_arm_mpu_config(void)
+{
+	int i;
+
+	int num_regions =
+		((MPU->TYPE & MPU_TYPE_DREGION_Msk) >> MPU_TYPE_DREGION_Pos);
+
+	for (i = 0; i < num_regions; i++) {
+		ARM_MPU_ClrRegion(i);
+	}
+}