diff -r 49f602ae24e5 -r a5a91f387791 src/Pure/Isar/attrib.ML
--- a/src/Pure/Isar/attrib.ML	Fri Dec 05 11:42:27 2008 +0100
+++ b/src/Pure/Isar/attrib.ML	Fri Dec 05 18:42:37 2008 +0100
@@ -146,8 +146,8 @@
 fun add_attributes raw_attrs thy =
   let
     val new_attrs =
-      raw_attrs |> map (fn (name, att, comment) => (name, ((att, comment), stamp ())));
-    fun add attrs = NameSpace.extend_table (Sign.naming_of thy) new_attrs attrs
+      raw_attrs |> map (fn (name, att, comment) => (Binding.name name, ((att, comment), stamp ())));
+    fun add attrs = fold (snd oo NameSpace.bind (Sign.naming_of thy)) new_attrs attrs
       handle Symtab.DUP dup => error ("Duplicate declaration of attributes " ^ quote dup);
   in Attributes.map add thy end;