diff --git a/doc/Jamfile.v2 b/doc/Jamfile.v2
index f69d0b5..500fa14 100644
--- a/doc/Jamfile.v2
+++ b/doc/Jamfile.v2
@@ -4,4 +4,5 @@ import boostbook : boostbook ;
 boostbook concepts : reference/concepts.xml 
 	:
         <format>pdf:<xsl:param>boost.url.prefix=http://www.boost.org/doc/libs/release/doc/html
+        <xsl:param>boost.root=../../../..
 	;