diff --git a/configure b/configure
index 1fd18e98e5..9f063ea75e 100755
--- a/configure
+++ b/configure
@@ -20656,7 +20656,7 @@ case "$docbook_path" in
 auto)
 	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: auto" >&5
 $as_echo "auto" >&6; }
-	docbook_xsl_trees="/usr/pkg/share/xsl/docbook /usr/local/share/xsl/docbook /usr/share/xsl/docbook /opt/local/share/xsl/docbook-xsl /usr/share/xml/docbook/stylesheet/docbook-xsl"
+	docbook_xsl_trees="/usr/pkg/share/xsl/docbook /usr/local/share/xsl/docbook-ns /usr/local/share/xsl/docbook /usr/share/xsl/docbook /opt/local/share/xsl/docbook-xsl /usr/share/xml/docbook/stylesheet/docbook-xsl"
 	;;
 *)
 	docbook_xsl_trees="$withval"
diff --git a/configure.in b/configure.in
index 94d8db383a..8b24380bf3 100644
--- a/configure.in
+++ b/configure.in
@@ -4130,7 +4130,7 @@ AC_ARG_WITH(docbook-xsl,
 case "$docbook_path" in
 auto)
 	AC_MSG_RESULT(auto)
-	docbook_xsl_trees="/usr/pkg/share/xsl/docbook /usr/local/share/xsl/docbook /usr/share/xsl/docbook /opt/local/share/xsl/docbook-xsl /usr/share/xml/docbook/stylesheet/docbook-xsl"
+	docbook_xsl_trees="/usr/pkg/share/xsl/docbook /usr/local/share/xsl/docbook-ns /usr/local/share/xsl/docbook /usr/share/xsl/docbook /opt/local/share/xsl/docbook-xsl /usr/share/xml/docbook/stylesheet/docbook-xsl"
 	;;
 *)
 	docbook_xsl_trees="$withval"