diff --git a/builtin/fsck.c b/builtin/fsck.c
index 70ff95837a..d606c4444d 100644
--- a/builtin/fsck.c
+++ b/builtin/fsck.c
@@ -109,7 +109,8 @@ static int fsck_error_func(struct fsck_options *o,
 
 static struct object_array pending;
 
-static int mark_object(struct object *obj, int type, void *data, struct fsck_options *options)
+static int mark_object(struct object *obj, enum object_type type,
+		       void *data, struct fsck_options *options)
 {
 	struct object *parent = data;