diff --git a/pkgs/tools/networking/socat/default.nix b/pkgs/tools/networking/socat/default.nix
index aee97d1de58a..edd5b0603e6b 100644
--- a/pkgs/tools/networking/socat/default.nix
+++ b/pkgs/tools/networking/socat/default.nix
@@ -23,11 +23,6 @@ stdenv.mkDerivation rec {
       --replace /sbin/ifconfig ifconfig
   '';
 
-  configureFlags = lib.optionals stdenv.hostPlatform.isMusl [
-    # musl doesn't have getprotobynumber_r
-    "sc_cv_getprotobynumber_r=2"
-  ];
-
   buildInputs = [ openssl readline ];
 
   hardeningEnable = [ "pie" ];