diff --git a/zephyr/port/include/boot/mcuboot_config/mcuboot_config.h b/zephyr/port/include/boot/mcuboot_config/mcuboot_config.h
index ade7590637..7ca6ee09f0 100644
--- a/zephyr/port/include/boot/mcuboot_config/mcuboot_config.h
+++ b/zephyr/port/include/boot/mcuboot_config/mcuboot_config.h
@@ -7,6 +7,8 @@
 #ifndef __MCUBOOT_CONFIG_H__
 #define __MCUBOOT_CONFIG_H__
 
+#include <zephyr/devicetree.h>
+
 /*
  * Signature types
  *
@@ -29,8 +31,21 @@
 #define MCUBOOT_SIGN_ED25519
 #endif
 
-#if defined(CONFIG_SECURE_FLASH_ENC_ENABLED)
-#define MCUBOOT_BOOT_MAX_ALIGN 32
+/* This mcuboot_config.h is used only by Zephyr builds, such as MCUboot
+ * Zephyr Port for ESP chips or a Zephyr application with MCUboot
+ * compatibilty (that builds the bootutil lib).
+ * In these cases, MCUBOOT_BOOT_MAX_ALIGN value must be taken from DT if
+ * the write-block-size is greater than 8 */
+#if DT_PROP(DT_CHOSEN(zephyr_flash), write_block_size) > 8
+#define MCUBOOT_BOOT_MAX_ALIGN DT_PROP(DT_CHOSEN(zephyr_flash), write_block_size)
+#endif
+
+#if defined(CONFIG_SECURE_FLASH_ENC_ENABLED) || (MCUBOOT_BOOT_MAX_ALIGN == 32)
+#define MCUBOOT_FLASH_HAS_HW_ENCRYPTION 1
+#endif
+
+#ifdef MCUBOOT_FLASH_HAS_HW_ENCRYPTION
+#define FLASH_AUX_WRITE_BUFFER_SIZE 0x100
 #endif
 
 /*