diff --git a/pkgs/top-level/perl-packages.nix b/pkgs/top-level/perl-packages.nix
index b7e2e53824d..d9a88c33868 100644
--- a/pkgs/top-level/perl-packages.nix
+++ b/pkgs/top-level/perl-packages.nix
@@ -3092,7 +3092,7 @@ let self = _self // overrides; _self = with self; {
     propagatedBuildInputs = [ DateTime ParamsValidate ];
     meta = {
       description = "Convert between DateTime and RFC2822/822 formats";
-      license = "perl";
+      license = with stdenv.lib.licenses; [ artistic1 gpl1Plus ];
     };
   };