1 files changed, 2 insertions, 0 deletions
diff --git a/commit.c b/commit.c
index e83056406f..3f2235ecf8 100644
--- a/commit.c
+++ b/commit.c
@@ -37,6 +37,8 @@ struct commit *lookup_commit(unsigned char *sha1)
 		ret->object.type = commit_type;
 		return ret;
 	}
+	if (!obj->type)
+		obj->type = commit_type;
 	return check_commit(obj, sha1);
 }