diff --git a/configure.ac b/configure.ac
index a6e63db..806808d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -44,7 +44,7 @@ need_err=yes
 need_errc=yes
 need_fpurge=yes
 need_funopen=yes
-need_md5=no
+need_md5=yes
 need_name_from_id=yes
 need_nlist=yes
 need_progname=yes