diff --git a/pkgs/by-name/so/socat/musl.patch b/pkgs/by-name/so/socat/musl.patch
new file mode 100644
index 000000000000..9ec957b4d8c2
--- /dev/null
+++ b/pkgs/by-name/so/socat/musl.patch
@@ -0,0 +1,46 @@
+From 8be51b7c3520fd2dbd1ba2e917a499c90822817f Mon Sep 17 00:00:00 2001
+From: Alyssa Ross <hi@alyssa.is>
+Date: Tue, 27 Jan 2026 10:46:19 +0100
+Subject: [PATCH] Fix build for musl
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+musl's struct msghdr includes padding members, so using undesignated
+initializers as was previously being done ended up initializing the
+wrong members:
+
+	gcc -O -D_GNU_SOURCE -Wall -Wno-parentheses  -DHAVE_CONFIG_H -I.  -I.   -c -o xio-netlink.o xio-netlink.c
+	xio-netlink.c: In function ‘xio_netlink_mtu’:
+	xio-netlink.c:33:59: error: initialization of ‘int’ from ‘void *’ makes integer from pointer without a cast [-Wint-conversion]
+	   33 | ct msghdr rtmsg = { &sa, sizeof(sa), &iov, 1, NULL, 0, 0 };
+	      |                                               ^~~~
+	xio-netlink.c:33:59: note: (near initialization for ‘rtmsg.__pad1’)
+	make: *** [<builtin>: xio-netlink.o] Error 1
+---
+ xio-netlink.c | 7 ++++++-
+ 1 file changed, 6 insertions(+), 1 deletion(-)
+
+diff --git a/xio-netlink.c b/xio-netlink.c
+index 533d78c..b0c5c3c 100644
+--- a/xio-netlink.c
++++ b/xio-netlink.c
+@@ -30,7 +30,12 @@ int xio_netlink_mtu(
+ 	struct nlmsghdr buf[8192/sizeof(struct nlmsghdr)];
+ 	struct iovec iov = { buf, sizeof(buf) };
+ 	struct sockaddr_nl sa;
+-	struct msghdr rtmsg = { &sa, sizeof(sa), &iov, 1, NULL, 0, 0 };
++	struct msghdr rtmsg = {
++		.msg_name = &sa,
++		.msg_namelen = sizeof(sa),
++		.msg_iov = &iov,
++		.msg_iovlen = 1,
++	};
+ 	struct nlmsghdr *nh;
+ 
+ 	Info2("Setting interface %d MTU to %u using netlink", interface_index, mtu);
+
+base-commit: 8834d6cc7e0d7b04cd31f9f7d0cb3e06913b0323
+-- 
+2.52.0
+
diff --git a/pkgs/by-name/so/socat/package.nix b/pkgs/by-name/so/socat/package.nix
index f3e1774f6c48..e5fef5ff3227 100644
--- a/pkgs/by-name/so/socat/package.nix
+++ b/pkgs/by-name/so/socat/package.nix
@@ -11,13 +11,17 @@
 
 stdenv.mkDerivation rec {
   pname = "socat";
-  version = "1.8.0.3";
+  version = "1.8.1.0";
 
   src = fetchurl {
     url = "http://www.dest-unreach.org/socat/download/${pname}-${version}.tar.bz2";
-    hash = "sha256-AesBc2HZW7OmlB6EC1nkRjo/q/kt9BVO0CsWou1qAJU=";
+    hash = "sha256-kfIi7mVVkDZgDCUFuZms6+1IuJnw4uU64cnDHWmGtqQ=";
   };
 
+  patches = [
+    ./musl.patch
+  ];
+
   postPatch = ''
     patchShebangs test.sh
     substituteInPlace test.sh \