diff --git a/boot/zephyr/include/mcuboot-mbedtls-cfg.h b/boot/zephyr/include/mcuboot-mbedtls-cfg.h
index 2bab537..02bf0b0 100644
--- a/boot/zephyr/include/mcuboot-mbedtls-cfg.h
+++ b/boot/zephyr/include/mcuboot-mbedtls-cfg.h
@@ -25,6 +25,7 @@
 #include "config-rsa.h"
 #elif defined(CONFIG_BOOT_SIGNATURE_TYPE_ECDSA_P256) || \
       defined(CONFIG_BOOT_ENCRYPT_EC256) || \
+      defined(CONFIG_BOOT_SERIAL_ENCRYPT_EC256) || \
       (defined(CONFIG_BOOT_ENCRYPT_X25519) && !defined(CONFIG_BOOT_SIGNATURE_TYPE_ED25519))
 #include "config-asn1.h"
 #elif defined(CONFIG_BOOT_SIGNATURE_TYPE_ED25519)
diff --git a/boot/zephyr/include/mcuboot_config/mcuboot_config.h b/boot/zephyr/include/mcuboot_config/mcuboot_config.h
index 6d043c4..a737a17 100644
--- a/boot/zephyr/include/mcuboot_config/mcuboot_config.h
+++ b/boot/zephyr/include/mcuboot_config/mcuboot_config.h
@@ -109,6 +109,11 @@
 #define MCUBOOT_ENCRYPT_EC256
 #endif
 
+#ifdef CONFIG_BOOT_SERIAL_ENCRYPT_EC256
+#define MCUBOOT_ENC_IMAGES
+#define MCUBOOT_ENCRYPT_EC256
+#endif
+
 #ifdef CONFIG_BOOT_ENCRYPT_X25519
 #define MCUBOOT_ENC_IMAGES
 #define MCUBOOT_ENCRYPT_X25519
diff --git a/boot/zephyr/include/single_loader.h b/boot/zephyr/include/single_loader.h
new file mode 100644
index 0000000..e762d15
--- /dev/null
+++ b/boot/zephyr/include/single_loader.h
@@ -0,0 +1,20 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Copyright (c) 2021-2021 Crodeon Technologies
+ *
+ */
+
+#ifndef H_SINGLE_LOADER_
+#define H_SINGLE_LOADER_
+#include "bootutil/fault_injection_hardening.h"
+
+/**
+ * Handle an encrypted firmware in the main flash.
+ * This will decrypt the image inplace
+ */
+int boot_handle_enc_fw();
+
+fih_int boot_image_validate(const struct flash_area *fa_p,
+                    struct image_header *hdr);
+#endif