--- a/Documentation/Makefile	2012-07-08 23:55:38.958779174 +0200
+++ b/Documentation/Makefile	2012-07-08 23:56:42.638010483 +0200
@@ -72,7 +72,7 @@
 	$(ASCIIDOC) -b xhtml11 -d manpage -f asciidoc.conf $(ASCIIDOC_EXTRA) $<
 
 %.1 : %.xml
-	xmlto -m callouts.xsl man $<
+	xmlto -m callouts.xsl --stringparam man.base.url.for.relative.links=$(htmldir) man $<
 
 %.xml : %.txt
 	$(ASCIIDOC) -b docbook -d manpage -f asciidoc.conf $<