diff --git a/pkgs/tools/networking/sstp/default.nix b/pkgs/tools/networking/sstp/default.nix
index dce6d1acb77..e8db3a07184 100644
--- a/pkgs/tools/networking/sstp/default.nix
+++ b/pkgs/tools/networking/sstp/default.nix
@@ -28,5 +28,6 @@ stdenv.mkDerivation rec {
     homepage = http://sstp-client.sourceforge.net/;
     platforms = stdenv.lib.platforms.linux;
     maintainers = [ stdenv.lib.maintainers.ktosiek ];
+    license = stdenv.lib.licenses.gpl2;
   };
 }