diff --git a/pkgs/tools/networking/pingtcp/default.nix b/pkgs/tools/networking/pingtcp/default.nix
index 4e7c080ea7f9..784639b788c3 100644
--- a/pkgs/tools/networking/pingtcp/default.nix
+++ b/pkgs/tools/networking/pingtcp/default.nix
@@ -22,6 +22,10 @@ stdenv.mkDerivation {
 
   doCheck = false;
 
+  postInstall = ''
+    install -Dm644 {..,$out/share/doc/pingtcp}/README.md
+  '';
+
   meta = with stdenv.lib; {
     inherit version;
     description = "Measure TCP handshake time";