diff --git a/bootstrap.conf b/bootstrap.conf
index cbe5b0ca4..ffdbcd907 100644
--- a/bootstrap.conf
+++ b/bootstrap.conf
@@ -260,6 +260,7 @@ gnulib_modules="
   sys_ioctl
   sys_resource
   sys_stat
+  sys_types
   sys_wait
   targetdir
   tempname