diff --git a/DC-SLE-HA-all b/DC-SLE-HA-all
index 33520aa2..ad285387 100644
--- a/DC-SLE-HA-all
+++ b/DC-SLE-HA-all
@@ -19,3 +19,4 @@ FALLBACK_STYLEROOT="/usr/share/xml/docbook/stylesheet/suse-ns"
 
 ## enable sourcing
 export DOCCONF=$BASH_SOURCE
+DOCBOOK5_RNG_URI="http://docbook.org/xml/5.2/rng/docbookxi.rng"
diff --git a/DC-SLE-HA-geo-guide b/DC-SLE-HA-geo-guide
index cb96adb3..44806ca6 100644
--- a/DC-SLE-HA-geo-guide
+++ b/DC-SLE-HA-geo-guide
@@ -23,3 +23,4 @@ export DOCCONF=$BASH_SOURCE
 
 ##do not show remarks directly in the (PDF) text
 #XSLTPARAM="--param use.xep.annotate.pdf=0"
+DOCBOOK5_RNG_URI="http://docbook.org/xml/5.2/rng/docbookxi.rng"
diff --git a/DC-SLE-HA-geo-quick b/DC-SLE-HA-geo-quick
index 0564bd0c..1440b9a5 100644
--- a/DC-SLE-HA-geo-quick
+++ b/DC-SLE-HA-geo-quick
@@ -23,3 +23,4 @@ export DOCCONF=$BASH_SOURCE
 
 ##do not show remarks directly in the (PDF) text
 #XSLTPARAM="--param use.xep.annotate.pdf=0"
+DOCBOOK5_RNG_URI="http://docbook.org/xml/5.2/rng/docbookxi.rng"
diff --git a/DC-SLE-HA-guide b/DC-SLE-HA-guide
index af67910d..726302d5 100644
--- a/DC-SLE-HA-guide
+++ b/DC-SLE-HA-guide
@@ -26,3 +26,4 @@ export DOCCONF=$BASH_SOURCE
 
 ### Sort the glossary
 XSLTPARAM="--param glossary.sort=1"
+DOCBOOK5_RNG_URI="http://docbook.org/xml/5.2/rng/docbookxi.rng"
diff --git a/DC-SLE-HA-install-quick b/DC-SLE-HA-install-quick
index 6e43baf7..734b247c 100644
--- a/DC-SLE-HA-install-quick
+++ b/DC-SLE-HA-install-quick
@@ -23,3 +23,4 @@ export DOCCONF=$BASH_SOURCE
 
 ##do not show remarks directly in the (PDF) text
 #XSLTPARAM="--param use.xep.annotate.pdf=0"
+DOCBOOK5_RNG_URI="http://docbook.org/xml/5.2/rng/docbookxi.rng"
diff --git a/DC-SLE-HA-nfs-quick b/DC-SLE-HA-nfs-quick
index 4d3c9832..a40f3120 100644
--- a/DC-SLE-HA-nfs-quick
+++ b/DC-SLE-HA-nfs-quick
@@ -20,3 +20,4 @@ FALLBACK_STYLEROOT="/usr/share/xml/docbook/stylesheet/suse-ns"
 
 ## enable sourcing
 export DOCCONF=$BASH_SOURCE
+DOCBOOK5_RNG_URI="http://docbook.org/xml/5.2/rng/docbookxi.rng"
diff --git a/DC-SLE-HA-pmremote-quick b/DC-SLE-HA-pmremote-quick
index 3da99892..2bd86b64 100644
--- a/DC-SLE-HA-pmremote-quick
+++ b/DC-SLE-HA-pmremote-quick
@@ -23,3 +23,4 @@ export DOCCONF=$BASH_SOURCE
 
 ##do not show remarks directly in the (PDF) text
 #XSLTPARAM="--param use.xep.annotate.pdf=0"
+DOCBOOK5_RNG_URI="http://docbook.org/xml/5.2/rng/docbookxi.rng"