1 files changed, 2 insertions, 1 deletions
diff --git a/notes.c b/notes.c
index f4f18daf07..ce5a1006a8 100644
--- a/notes.c
+++ b/notes.c
@@ -1,4 +1,5 @@
 #define USE_THE_REPOSITORY_VARIABLE
+#define DISABLE_SIGN_COMPARE_WARNINGS
 
 #include "git-compat-util.h"
 #include "config.h"
@@ -1352,7 +1353,7 @@ int copy_note(struct notes_tree *t,
 	if (note)
 		return add_note(t, to_obj, note, combine_notes);
 	else if (existing_note)
-		return add_note(t, to_obj, null_oid(), combine_notes);
+		return add_note(t, to_obj, null_oid(the_hash_algo), combine_notes);
 
 	return 0;
 }