diff --git a/src/boot/efi/sha256.h b/src/boot/efi/sha256.h
index 464be59c25..3a43601e73 100644
--- a/src/boot/efi/sha256.h
+++ b/src/boot/efi/sha256.h
@@ -1,6 +1,8 @@
 /* SPDX-License-Identifier: LGPL-2.1-or-later */
 #pragma once
 
+#include <endian.h>
+
 #include <efi.h>
 #include <efilib.h>