1 files changed, 4 insertions, 1 deletions

diff --git a/object.c b/object.c
index e680d881a4..fe22223566 100644
--- a/object.c
+++ b/object.c
@@ -182,9 +182,12 @@ struct object *lookup_unknown_object(const unsigned char *sha1)
 
 struct object *parse_object_buffer(const unsigned char *sha1, enum object_type type, unsigned long size, void *buffer, int *eaten_p)
 {
+	struct object_id oid;
 	struct object *obj;
 	*eaten_p = 0;
 
+	hashcpy(oid.hash, sha1);
+
 	obj = NULL;
 	if (type == OBJ_BLOB) {
 		struct blob *blob = lookup_blob(sha1);
@@ -206,7 +209,7 @@ struct object *parse_object_buffer(const unsigned char *sha1, enum object_type t
 			}
 		}
 	} else if (type == OBJ_COMMIT) {
-		struct commit *commit = lookup_commit(sha1);
+		struct commit *commit = lookup_commit(&oid);
 		if (commit) {
 			if (parse_commit_buffer(commit, buffer, size))
 				return NULL;