diff --git a/app-admin/killproc/files/killproc-2.13-fix_c23.patch b/app-admin/killproc/files/killproc-2.13-fix_c23.patch
new file mode 100644
index 0000000000000..87f71074a5eee
--- /dev/null
+++ b/app-admin/killproc/files/killproc-2.13-fix_c23.patch
@@ -0,0 +1,15 @@
+https://bugs.gentoo.org/943846
+--- a/libinit.h
++++ b/libinit.h
+@@ -107,7 +107,11 @@
+ #define  DEFPIDEXT ".pid"
+ #define  DEFPIDLEN 14		/* The string length of /var/run/.pid + 1 */
+ 
++#if __STDC_VERSION__ <= 201710L
+ typedef enum _boolean {false, true} boolean;
++#else
++typedef bool boolean;
++#endif
+ 
+ extern char **environ;
+ extern char     * newenvp[];
diff --git a/app-admin/killproc/killproc-2.13-r2.ebuild b/app-admin/killproc/killproc-2.13-r2.ebuild
new file mode 100644
index 0000000000000..377516bb1adf7
--- /dev/null
+++ b/app-admin/killproc/killproc-2.13-r2.ebuild
@@ -0,0 +1,36 @@
+# Copyright 1999-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit toolchain-funcs
+
+DESCRIPTION="killproc and assorted tools for boot scripts"
+HOMEPAGE="https://ftp.suse.com/pub/projects/init/"
+SRC_URI="https://ftp.suse.com/pub/projects/init/${P}.tar.gz"
+
+LICENSE="GPL-2+"
+SLOT="0"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86"
+
+PATCHES=(
+	"${FILESDIR}/${P}-makefile.patch"
+	"${FILESDIR}/${P}-argz.patch"
+	"${FILESDIR}/${P}-fix_c23.patch"
+)
+
+src_prepare() {
+	default
+
+	tc-export CC
+	export COPTS="${CFLAGS}"
+}
+
+src_install() {
+	into /
+	dosbin checkproc fsync killproc startproc usleep
+
+	into /usr
+	doman *.8 *.1
+	dodoc README *.lsm
+}