diff --git a/pkgs/development/libraries/libxmlxx/default.nix b/pkgs/development/libraries/libxmlxx/default.nix
index 23b36db8fe10..226fe5be536a 100644
--- a/pkgs/development/libraries/libxmlxx/default.nix
+++ b/pkgs/development/libraries/libxmlxx/default.nix
@@ -10,6 +10,8 @@ stdenv.mkDerivation rec {
     sha256 = "1sb3akryklvh2v6m6dihdnbpf1lkx441v972q9hlz1sq6bfspm2a";
   };
 
+  outputs = [ "out" "devdoc" ];
+
   nativeBuildInputs = [ pkgconfig perl ];
 
   propagatedBuildInputs = [ libxml2 glibmm ];