diff --git a/pkgs/by-name/rm/rman/package.nix b/pkgs/by-name/rm/rman/package.nix
index 4fbaded2596a..794afd971082 100644
--- a/pkgs/by-name/rm/rman/package.nix
+++ b/pkgs/by-name/rm/rman/package.nix
@@ -37,7 +37,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "Parse formatted man pages and man page source from most flavors of UNIX and converts them to HTML, ASCII, TkMan, DocBook, and other formats";
-    license = "artistic";
+    license = lib.licenses.artistic1;
     platforms = lib.platforms.all;
     mainProgram = "rman";
   };