diff --git a/mdx/_rules/check_mdui_logo_length.xsl b/mdx/_rules/check_mdui_logo_length.xsl
index 11ee3fc..6d359b6 100644
--- a/mdx/_rules/check_mdui_logo_length.xsl
+++ b/mdx/_rules/check_mdui_logo_length.xsl
@@ -11,7 +11,6 @@
     xmlns:ds="http://www.w3.org/2000/09/xmldsig#"
     xmlns:md="urn:oasis:names:tc:SAML:2.0:metadata"
     xmlns:mdui="urn:oasis:names:tc:SAML:metadata:ui"
-    xmlns:mdxURL="xalan://uk.ac.sdss.xalan.md.URLchecker"
     xmlns:set="http://exslt.org/sets"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xmlns="urn:oasis:names:tc:SAML:2.0:metadata">
diff --git a/mdx/strip-mdui-logo-length.xsl b/mdx/strip-mdui-logo-length.xsl
index 18544d7..ad38703 100644
--- a/mdx/strip-mdui-logo-length.xsl
+++ b/mdx/strip-mdui-logo-length.xsl
@@ -11,7 +11,6 @@
     xmlns:ds="http://www.w3.org/2000/09/xmldsig#"
     xmlns:md="urn:oasis:names:tc:SAML:2.0:metadata"
     xmlns:mdui="urn:oasis:names:tc:SAML:metadata:ui"
-    xmlns:mdxURL="xalan://uk.ac.sdss.xalan.md.URLchecker"
     xmlns:set="http://exslt.org/sets"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xmlns="urn:oasis:names:tc:SAML:2.0:metadata">