--- a/usr/src/java/adr/xml/style/radadr-docbook.xsl	Wed Mar 14 10:45:15 2012 -0400
+++ b/usr/src/java/adr/xml/style/radadr-docbook.xsl	Thu Mar 15 11:34:08 2012 -0400
@@ -22,6 +22,13 @@
   CDDL HEADER END
 -->
 
+<!DOCTYPE stylesheet [
+  <!ENTITY % isobox PUBLIC "-//W3C//ENTITIES Box and Line Drawing//EN//XML"
+  "http://www.w3.org/2003/entities/2007/isobox.ent" 
+  >
+  %isobox;
+]>
+
 <xsl:stylesheet version="1.0" xmlns:adr="http://www.opensolaris.org/ns/adr"
     xmlns:xsl="http://www.w3.org/1999/XSL/Transform">