* Copyright (C) Linus Torvalds, 2005
  */
 #include "cache.h"
+#include "config.h"
 #include "commit.h"
 #include "tree.h"
 #include "builtin.h"
                        if (get_sha1_commit(argv[i], oid.hash))
                                die("Not a valid object name %s", argv[i]);
                        assert_sha1_type(oid.hash, OBJ_COMMIT);
-                       new_parent(lookup_commit(oid.hash), &parents);
+                       new_parent(lookup_commit(&oid), &parents);
                        continue;
                }