thodg/got

diff --git a/lib/got_lib_pack.h b/lib/got_lib_pack.h
index e2c8744..8bec2bc 100644
--- a/lib/got_lib_pack.h
+++ b/lib/got_lib_pack.h
@@ -24,6 +24,8 @@ struct got_pack {
 	struct got_delta_cache *delta_cache;
 };
 
+struct got_packidx;
+
 const struct got_error *got_pack_close(struct got_pack *);
 
 const struct got_error *got_pack_parse_offset_delta(off_t *, size_t *,