diff --git a/pkgs/development/libraries/tidyp/default.nix b/pkgs/development/libraries/tidyp/default.nix
index ba95da77b72..51dabbd2beb 100644
--- a/pkgs/development/libraries/tidyp/default.nix
+++ b/pkgs/development/libraries/tidyp/default.nix
@@ -15,5 +15,6 @@ stdenv.mkDerivation rec {
     homepage = http://tidyp.com/;
     platforms = platforms.linux;
     maintainers = with maintainers; [ pSub ];
+    license = licenses.bsd3;
   };
 }