diff --git a/builtin/pack-objects.c b/builtin/pack-objects.c
index 1a3dd445f8..0b1f82cd3a 100644
--- a/builtin/pack-objects.c
+++ b/builtin/pack-objects.c
@@ -3397,7 +3397,7 @@ static void read_object_list_from_stdin(void)
 			if (feof(stdin))
 				break;
 			if (!ferror(stdin))
-				die("BUG: fgets returned NULL, not EOF, not error!");
+				BUG("fgets returned NULL, not EOF, not error!");
 			if (errno != EINTR)
 				die_errno("fgets");
 			clearerr(stdin);