diff --git a/commit.c b/commit.c
index 0bbfa2a..caee5bc 100644
--- a/commit.c
+++ b/commit.c
@@ -52,8 +52,9 @@
 
 	if (!obj)
 		return NULL;
-	if (obj->type == tag_type)
-		obj = ((struct tag *)obj)->tagged;
+	while (obj->type == tag_type)
+		obj = parse_object(((struct tag *)obj)->tagged->sha1);
+
 	return check_commit(obj, sha1);
 }