diff --git a/pkgs/by-name/kn/knot-resolver_5/package.nix b/pkgs/by-name/kn/knot-resolver_5/package.nix
index ad7af52005f6..1bc541bb9498 100644
--- a/pkgs/by-name/kn/knot-resolver_5/package.nix
+++ b/pkgs/by-name/kn/knot-resolver_5/package.nix
@@ -2,6 +2,7 @@
   lib,
   stdenv,
   fetchurl,
+  fetchpatch,
   # native deps.
   runCommand,
   pkg-config,
@@ -47,6 +48,15 @@ let
       "dev"
     ];
 
+    patches = [
+      (fetchpatch {
+        # https://gitlab.nic.cz/knot/knot-resolver/-/merge_requests/1772
+        url = "https://gitlab.nic.cz/knot/knot-resolver/-/commit/f4eaf8e69cc9839f68b613d0be10103e05c57fe9.patch";
+        hash = "sha256-u/YQ85Jb5OxV8G3HeVPQUw0cmA+TLIDPze9mreqJGL4=";
+        excludes = [ "daemon/ratelimiting.test/tests.inc.c" ];
+      })
+    ];
+
     # Path fixups for the NixOS service.
     postPatch = ''
       patch meson.build <<EOF