diff --git a/pkgs/applications/networking/tcpkali/default.nix b/pkgs/applications/networking/tcpkali/default.nix
index a7142542238..fae3bde72f0 100644
--- a/pkgs/applications/networking/tcpkali/default.nix
+++ b/pkgs/applications/networking/tcpkali/default.nix
@@ -11,6 +11,9 @@ stdenv.mkDerivation rec {
     rev = "v${version}";
     sha256 = "09ky3cccaphcqc6nhfs00pps99lasmzc2pf5vk0gi8hlqbbhilxf";
   };
+  postPatch = ''
+    sed -ie '/sys\/sysctl\.h/d' src/tcpkali_syslimits.c
+  '';
   nativeBuildInputs = [ autoreconfHook ];
   buildInputs = [ bison];
   meta = {