diff --git a/pkgs/top-level/perl-packages.nix b/pkgs/top-level/perl-packages.nix
index d9a88c33868..7bdabaf923c 100644
--- a/pkgs/top-level/perl-packages.nix
+++ b/pkgs/top-level/perl-packages.nix
@@ -3172,7 +3172,7 @@ let self = _self // overrides; _self = with self; {
     meta = {
       homepage = http://search.cpan.org/dist/DateTime-Format-W3CDTF/;
       description = "Parse and format W3CDTF datetime strings";
-      license = "perl";
+      license = with stdenv.lib.licenses; [ artistic1 gpl1Plus ];
     };
   };