diff --git a/include/xbps_api.h b/include/xbps_api.h
index f996cb8c..da08d638 100644
--- a/include/xbps_api.h
+++ b/include/xbps_api.h
@@ -584,7 +584,8 @@ int xbps_purge_all_pkgs(void);
  * Register a package into the installed packages database.
  *
  * @param[in] pkg_dict A dictionary with the following objects:
- * \a pkgname, \a version, \a pkgver and \a short_desc (string).
+ * \a pkgname, \a version, \a pkgver, \a short_desc (string)
+ * and optionally \a provides (array of strings).
  * @param[in] automatic Set it to true to mark package that has been
  * installed by another package, and not explicitly.
  *