diff --git a/pkgs/development/libraries/aalib/default.nix b/pkgs/development/libraries/aalib/default.nix
index 69d736d4476..0209c41abee 100644
--- a/pkgs/development/libraries/aalib/default.nix
+++ b/pkgs/development/libraries/aalib/default.nix
@@ -36,5 +36,6 @@ stdenv.mkDerivation {
   meta = {
     description = "ASCII art graphics library";
     platforms = stdenv.lib.platforms.unix;
+    license = stdenv.lib.licenses.lgpl2;
   };
 }