diff --git a/configure.ac b/configure.ac
index e5642f6b13..73687dc480 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,9 +1,9 @@
 AC_INIT([udev], [143], [linux-hotplug@vger.kernel.org])
 AC_PREREQ(2.60)
 AM_INIT_AUTOMAKE([check-news foreign 1.9 dist-bzip2])
+m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
 AC_DISABLE_STATIC
 AC_USE_SYSTEM_EXTENSIONS
-dnl AM_SILENT_RULES
 AC_SYS_LARGEFILE
 AC_CONFIG_MACRO_DIR([m4])
 AC_PROG_LIBTOOL
diff --git a/extras/gudev/docs/gudev-docs.xml b/extras/gudev/docs/gudev-docs.xml
index 8ad3b6e566..bb5f560402 100644
--- a/extras/gudev/docs/gudev-docs.xml
+++ b/extras/gudev/docs/gudev-docs.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0"?>
-<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
-               "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd" [
+<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
+               "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [
 <!ENTITY version SYSTEM "version.xml">
 ]>
 <book id="index" xmlns:xi="http://www.w3.org/2003/XInclude">