diff --git a/sysa/SHA256SUMS.pkgs b/sysa/SHA256SUMS.pkgs
index 65a1dd3..89d79c8 100644
--- a/sysa/SHA256SUMS.pkgs
+++ b/sysa/SHA256SUMS.pkgs
@@ -62,7 +62,7 @@ d85cff8f9ff76533287891ec2019416fa585815e514743e5b76efd9f17f5ef5c  grep-3.7_0.tar
 b38422d646590600444f0ff12fee6fd738baaf471338aa67899db950d3521127  guile-3.0.9_0.tar.bz2
 8d2015b87337abbf287f7a39ee4cf53514120b5d3e90a93fe7d533dcc43f14fa  help2man-1.36.4_0.tar.bz2
 3f06d1a7f1b1770d4550ff6316c7f06fd26e30bddad7c1b665f1fae80e409c8c  kbd-1.15_0.tar.bz2
-6cb8bd6df0472665cd82ef4f4eae8368543a4d04eb90ec5f6cf4f224d1e16e51  kexec-linux-1.0.0_0.tar.bz2
+d23886557310f7ff2c98898eac24b4fe8704b22e88d094e96ff996cf0d2635a4  kexec-linux-1.0.0_0.tar.bz2
 2a661da13801028f5af98e5d9f6de417c21c90df1bcef4809caf0c2094fdd8f4  kexec-tools-2.0.22_0.tar.bz2
 e89e4fc8ba4f917f4f609ba781fc13e43d31479d47a9da2ba3bc7ce5fcbbe6b3  libarchive-3.5.2_0.tar.bz2
 36550df491767bb24d2ccab304ce70a3b4956e7c0c0e0c343d922fd57cdafbdd  libatomic_ops-7.6.10_0.tar.bz2
diff --git a/sysa/kexec-linux-1.0.0/files/kexec-linux.c b/sysa/kexec-linux-1.0.0/files/kexec-linux.c
index 51a7573..a43c17c 100644
--- a/sysa/kexec-linux-1.0.0/files/kexec-linux.c
+++ b/sysa/kexec-linux-1.0.0/files/kexec-linux.c
@@ -2,6 +2,7 @@
 /* SPDX-License-Identifier: MIT */
 #include <stdio.h>
 #include <stdlib.h>
+#include <stdint.h>
 #include <unistd.h>
 #include <sys/reboot.h>
 #include <sys/stat.h>
@@ -14,6 +15,7 @@ int main(int argc, char **argv) {
 	char *ramdrive_file_name, *kernel_file_name, *initramfs_file_name;
 	FILE *ramdrive_file;
 	struct stat stats;
+	uint32_t size;
 
 	if (argc < 3) {
 		puts("Usage: fiwix-kexec-linux <ram-drive-name> <kernel-file-name> <initramfs-file-name>");
@@ -29,7 +31,8 @@ int main(int argc, char **argv) {
 
 	/* Write length of kernel */
 	if (stat(kernel_file_name, &stats) == 0) {
-		fwrite(&stats.st_size, 4, 1, ramdrive_file);
+		size = (uint32_t) stats.st_size;
+		fwrite(&size, sizeof(size), 1, ramdrive_file);
 	} else {
 		fprintf(stderr, "Cannot stat kernel file '%s'\n", kernel_file_name);
 		exit(1);
@@ -37,7 +40,8 @@ int main(int argc, char **argv) {
 
 	/* Write length of initramfs */
 	if (stat(initramfs_file_name, &stats) == 0) {
-		fwrite(&stats.st_size, 4, 1, ramdrive_file);
+		size = (uint32_t) stats.st_size;
+		fwrite(&size, sizeof(size), 1, ramdrive_file);
 	} else {
 		fprintf(stderr, "Cannot stat initramfs file '%s'\n", initramfs_file_name);
 		exit(1);