diff --git a/pkgs/applications/networking/instant-messengers/amsn/default.nix b/pkgs/applications/networking/instant-messengers/amsn/default.nix
index 623dc838233..e6ffd72afa5 100644
--- a/pkgs/applications/networking/instant-messengers/amsn/default.nix
+++ b/pkgs/applications/networking/instant-messengers/amsn/default.nix
@@ -19,5 +19,6 @@ stdenv.mkDerivation {
     description = "Instant messaging (MSN Messenger clone)";
     homepage = http://amsn-project.net;
     platforms = stdenv.lib.platforms.linux;
+    license = stdenv.lib.licenses.gpl2;
   };
 }