diff --git a/pkgs/tools/networking/ip2unix/default.nix b/pkgs/tools/networking/ip2unix/default.nix
index b37d5b1272c8a9..e30b806c6dc7cd 100644
--- a/pkgs/tools/networking/ip2unix/default.nix
+++ b/pkgs/tools/networking/ip2unix/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, meson, ninja, pkg-config, yaml-cpp, systemd
+{ lib, stdenv, fetchFromGitHub, fetchpatch, meson, ninja, pkg-config, yaml-cpp, systemd
 , python3Packages, asciidoc, libxslt, docbook_xml_dtd_45, docbook_xsl
 , libxml2, docbook5
 }:
@@ -14,6 +14,15 @@ stdenv.mkDerivation rec {
     hash = "sha256-+p5wQbX35LAjZ4vIE4AhI4M6gQ7gVviqf9jJDAr9xg8";
   };
 
+  patches = [
+    # https://github.com/nixcloud/ip2unix/pull/35
+    # fix out of range string_view access
+    (fetchpatch {
+      url = "https://github.com/nixcloud/ip2unix/commit/050ddf76b4b925f27e255fbb820b0700407ceb2b.patch";
+      hash = "sha256-5vaLmZmwuiMGV4KnVhuDSnXG1a390aBU51TShwpaMLs=";
+    })
+  ];
+
   nativeBuildInputs = [
     meson ninja pkg-config asciidoc libxslt.bin docbook_xml_dtd_45 docbook_xsl
     libxml2.bin docbook5 python3Packages.pytest python3Packages.pytest-timeout