diff -r a033b5b6f544 -r 3a196e63a80d src/Pure/Pure.thy
--- a/src/Pure/Pure.thy	Sat Aug 03 13:12:58 2024 +0200
+++ b/src/Pure/Pure.thy	Sun Aug 04 12:21:13 2024 +0200
@@ -605,7 +605,7 @@
 
 val _ =
   hide_names \<^command_keyword>\<open>hide_type\<close> "types" Sign.hide_type Parse.type_const
-    ((#1 o dest_Type) oo Proof_Context.read_type_name {proper = true, strict = false});
+    (dest_Type_name oo Proof_Context.read_type_name {proper = true, strict = false});
 
 val _ =
   hide_names \<^command_keyword>\<open>hide_const\<close> "consts" Sign.hide_const Parse.const