diff --git a/include/tpax/tpax.h b/include/tpax/tpax.h
index ef78199..ad596c4 100644
--- a/include/tpax/tpax.h
+++ b/include/tpax/tpax.h
@@ -151,11 +151,11 @@ tpax_api int  tpax_lib_get_driver_fdctx     (const struct tpax_driver_ctx *, str
 tpax_api int  tpax_lib_set_driver_fdctx     (struct tpax_driver_ctx *, const struct tpax_fd_ctx *);
 
 /* core api */
-tpax_api int  tpax_archive_append       (const struct tpax_driver_ctx *, const struct tpax_unit_ctx *);
+tpax_api int  tpax_archive_append           (const struct tpax_driver_ctx *, const struct tpax_unit_ctx *);
 
-tpax_api int tpax_archive_write         (const struct tpax_driver_ctx *);
+tpax_api int  tpax_archive_write            (const struct tpax_driver_ctx *);
 
-tpax_api int  tpax_archive_seal         (const struct tpax_driver_ctx *);
+tpax_api int  tpax_archive_seal             (const struct tpax_driver_ctx *);
 
 /* helper api */
 tpax_api int  tpax_path_copy            (char *, const char *, size_t, uint32_t, size_t *);