1 files changed, 2 insertions, 0 deletions
diff --git a/puzzles.h b/puzzles.h
index 971cb29..6933e70 100644
--- a/puzzles.h
+++ b/puzzles.h
@@ -253,6 +253,8 @@ char *midend_get_game_id(midend *me);
 int midend_can_format_as_text_now(midend *me);
 char *midend_text_format(midend *me);
 char *midend_solve(midend *me);
+int midend_can_undo(midend *me);
+int midend_can_redo(midend *me);
 void midend_supersede_game_desc(midend *me, char *desc, char *privdesc);
 char *midend_rewrite_statusbar(midend *me, char *text);
 void midend_serialise(midend *me,