diff -r 320bcbf34849 -r e71cb37c7395 src/Pure/Isar/proof.ML
--- a/src/Pure/Isar/proof.ML	Thu Sep 12 14:42:04 2024 +0200
+++ b/src/Pure/Isar/proof.ML	Thu Sep 12 15:09:07 2024 +0200
@@ -394,7 +394,7 @@
       else if mode = Backward then Proof_Context.pretty_ctxt ctxt
       else [];
 
-    val position_markup = Position.markup (Position.thread_data ()) Markup.position;
+    val position_markup = Position.markup_position (Position.thread_data ());
   in
     [Pretty.block
       [Pretty.mark_str (position_markup, "proof"), Pretty.str (" (" ^ mode_name mode ^ ")")]] @