diff --git a/ctdb/doc/ctdb.1.xml b/ctdb/doc/ctdb.1.xml
index 7167ff22fea..ebb9c8e30b6 100644
--- a/ctdb/doc/ctdb.1.xml
+++ b/ctdb/doc/ctdb.1.xml
@@ -1,5 +1,7 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!DOCTYPE refentry PUBLIC "-//Samba-Team//DTD DocBook V4.2-Based Variant V1.0//EN" "http://www.samba.org/samba/DTD/samba-doc">
+<!DOCTYPE refentry
+	PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
+	"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 <refentry id="ctdb.1">
 
 <refmeta>
diff --git a/ctdb/doc/ctdbd.1.xml b/ctdb/doc/ctdbd.1.xml
index 1053d9b2c5c..111a8f40ca4 100644
--- a/ctdb/doc/ctdbd.1.xml
+++ b/ctdb/doc/ctdbd.1.xml
@@ -1,5 +1,7 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!DOCTYPE refentry PUBLIC "-//Samba-Team//DTD DocBook V4.2-Based Variant V1.0//EN" "http://www.samba.org/samba/DTD/samba-doc">
+<!DOCTYPE refentry
+	PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
+	"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 <refentry id="ctdbd.1">
 
 <refmeta>
diff --git a/ctdb/doc/ltdbtool.1.xml b/ctdb/doc/ltdbtool.1.xml
index a0379a6c8f3..fe9e3e880d6 100644
--- a/ctdb/doc/ltdbtool.1.xml
+++ b/ctdb/doc/ltdbtool.1.xml
@@ -1,5 +1,7 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!DOCTYPE refentry PUBLIC "-//Samba-Team//DTD DocBook V4.2-Based Variant V1.0//EN" "http://www.samba.org/samba/DTD/samba-doc">
+<!DOCTYPE refentry
+	PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
+	"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 <refentry id="ltdbtool.1">
 
 <refmeta>
diff --git a/ctdb/doc/onnode.1.xml b/ctdb/doc/onnode.1.xml
index 1b97c2f2964..65b17924cec 100644
--- a/ctdb/doc/onnode.1.xml
+++ b/ctdb/doc/onnode.1.xml
@@ -1,5 +1,7 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!DOCTYPE refentry PUBLIC "-//Samba-Team//DTD DocBook V4.2-Based Variant V1.0//EN" "http://www.samba.org/samba/DTD/samba-doc">
+<!DOCTYPE refentry
+	PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
+	"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 <refentry id="onnode.1">
 
 <refmeta>
diff --git a/ctdb/doc/ping_pong.1.xml b/ctdb/doc/ping_pong.1.xml
index f4148aec2a9..2e4b016bbc2 100644
--- a/ctdb/doc/ping_pong.1.xml
+++ b/ctdb/doc/ping_pong.1.xml
@@ -1,5 +1,7 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!DOCTYPE refentry PUBLIC "-//Samba-Team//DTD DocBook V4.2-Based Variant V1.0//EN" "http://www.samba.org/samba/DTD/samba-doc">
+<!DOCTYPE refentry
+	PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
+	"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 <refentry id="ping_pong.1">
 
 <refmeta>