diff --git a/DC-susecloud-admin b/DC-susecloud-admin
index d9312ef0a..1d2cd06cc 100644
--- a/DC-susecloud-admin
+++ b/DC-susecloud-admin
@@ -26,3 +26,5 @@ export DOCCONF=$BASH_SOURCE
 ##do not show remarks directly in the (PDF) text 
 #XSLTPARAM="--param use.xep.annotate.pdf 0"
 
+# Schema URL
+DOCBOOK5_RNG_URI="http://docbook.org/xml/5.1/rng/docbookxi.rng"
diff --git a/DC-susecloud-all b/DC-susecloud-all
index 6fcd99038..e7ca9b563 100644
--- a/DC-susecloud-all
+++ b/DC-susecloud-all
@@ -24,3 +24,5 @@ PROFOS="sles"
 export DOCCONF=$BASH_SOURCE
 
 #XSLTPARAM="--param hyphenate.verbatim 0"
+# Schema URL
+DOCBOOK5_RNG_URI="http://docbook.org/xml/5.1/rng/docbookxi.rng"
diff --git a/DC-susecloud-deployment b/DC-susecloud-deployment
index ac86ede4d..ef46a6b53 100644
--- a/DC-susecloud-deployment
+++ b/DC-susecloud-deployment
@@ -22,3 +22,5 @@ STYLEROOT="/usr/share/xml/docbook/stylesheet/suse"
 export DOCCONF=$BASH_SOURCE
 
 #XSLTPARAM="--param hyphenate.verbatim 0"
+# Schema URL
+DOCBOOK5_RNG_URI="http://docbook.org/xml/5.1/rng/docbookxi.rng"
diff --git a/DC-susecloud-user b/DC-susecloud-user
index 197f3cd9c..116515a6a 100644
--- a/DC-susecloud-user
+++ b/DC-susecloud-user
@@ -25,3 +25,5 @@ export DOCCONF=$BASH_SOURCE
 
 ##do not show remarks directly in the (PDF) text 
 #XSLTPARAM="--param use.xep.annotate.pdf 0"
+# Schema URL
+DOCBOOK5_RNG_URI="http://docbook.org/xml/5.1/rng/docbookxi.rng"