diff --git a/pkgs/by-name/ds/dsniff/package.nix b/pkgs/by-name/ds/dsniff/package.nix
index 8d935d49f6f2..09e9e286b03b 100644
--- a/pkgs/by-name/ds/dsniff/package.nix
+++ b/pkgs/by-name/ds/dsniff/package.nix
@@ -114,6 +114,7 @@ stdenv.mkDerivation (finalAttrs: {
     ];
     NIX_CFLAGS_COMPILE = toString [
       "-I${libtirpc.dev}/include/tirpc"
+      "-std=gnu17"
     ];
   };
   postPatch = ''