diff --git a/pkgs/by-name/co/corkscrew/package.nix b/pkgs/by-name/co/corkscrew/package.nix
index ac48fa7ee387..314c8767c9e4 100644
--- a/pkgs/by-name/co/corkscrew/package.nix
+++ b/pkgs/by-name/co/corkscrew/package.nix
@@ -17,6 +17,8 @@ stdenv.mkDerivation (finalAttrs: {
 
   nativeBuildInputs = [ autoreconfHook ];
 
+  env.NIX_CFLAGS_COMPILE = "-DANSI_FUNC";
+
   meta = {
     homepage = "https://github.com/bryanpkc/corkscrew";
     description = "Tool for tunneling SSH through HTTP proxies";