diff --git a/lrzsz-socklen.patch b/lrzsz-socklen.patch
new file mode 100644
index 0000000..a597b78
--- /dev/null
+++ b/lrzsz-socklen.patch
@@ -0,0 +1,26 @@
+Use socklen_t as the length of the socket address (which is a bit of
+an anachronism, considering the rest of the sources).  The previous
+code des not work on 64-bit big-endian architectures.
+
+diff --git a/src/tcp.c b/src/tcp.c
+index 137f94c37503abe9..69da8c9f8dff304b 100644
+--- a/src/tcp.c
++++ b/src/tcp.c
+@@ -56,7 +56,7 @@ tcp_server (char *buf)
+ 	struct sockaddr_in s;
+ 	struct sockaddr_in t;
+ 	int on=1;
+-	size_t len;
++	socklen_t len;
+ 
+ 	if ((sock = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) {
+ 		error(1,errno,"socket");
+@@ -91,7 +91,7 @@ tcp_accept (int d)
+ {
+ 	int so;
+ 	struct  sockaddr_in s;
+-	size_t namelen;
++	socklen_t namelen;
+ 	int num=0;
+ 
+ 	namelen = sizeof(s);
diff --git a/lrzsz.spec b/lrzsz.spec
index a87f76e..015f06e 100644
--- a/lrzsz.spec
+++ b/lrzsz.spec
@@ -1,7 +1,7 @@
 Summary: The lrz and lsz modem communications programs
 Name: lrzsz
 Version: 0.12.20
-Release: 61%{?dist}
+Release: 62%{?dist}
 License: GPL-2.0-or-later AND GPL-2.0-only
 Source: http://www.ohse.de/uwe/releases/%{name}-%{version}.tar.gz
 Patch1: lrzsz-0.12.20-glibc21.patch
@@ -10,6 +10,7 @@ Patch3: lrzsz-0.12.20-man.patch
 Patch4: lrzsz-0.12.20-aarch64.patch
 Patch5: lrzsz-configure-c99.patch
 Patch6: lrzsz-c99.patch
+Patch7: lrzsz-socklen.patch
 Url: http://www.ohse.de/uwe/software/lrzsz.html
 BuildRequires: gcc gettext
 BuildRequires: make
@@ -29,6 +30,7 @@ copylefted Zmodem solution for Linux systems.
 %patch4 -p1 -b .aarch64
 %patch5 -p1
 %patch6 -p1
+%patch7 -p1
 
 rm -f po/*.gmo
 
@@ -53,6 +55,9 @@ for m in sb sx; do ln -s sz.1 %{buildroot}%{_mandir}/man1/$m.1; done
 %{_mandir}/*/*
 
 %changelog
+* Mon Dec 18 2023 Florian Weimer <fweimer@redhat.com> - 0.12.20-62
+- Fix socket length incompatibility (C compatibility issue)
+
 * Tue Oct 31 2023 Tomas Korbar <tkorbar@redhat.com> - 0.12.20-61
 - Add additional SPDX licenses found by scancode tool