diff --git a/pkgs/development/libraries/prison/default.nix b/pkgs/development/libraries/prison/default.nix
index 29ff988a2266..d40b4442e38e 100644
--- a/pkgs/development/libraries/prison/default.nix
+++ b/pkgs/development/libraries/prison/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "Qt4 library for QR-codes";
-    maintainers = [ ];
+    license = stdenv.lib.licenses.mit;
     inherit (qt4.meta) platforms;
   };
 }