diff --git a/doc/Jamfile.v2 b/doc/Jamfile.v2
index 7e3fe6c..4d01cfb 100644
--- a/doc/Jamfile.v2
+++ b/doc/Jamfile.v2
@@ -10,6 +10,7 @@ boostbook standalone
     :
         typeof
     :
+        <xsl:param>boost.root=../../../..
         <xsl:param>nav.layout=none
         <xsl:param>navig.graphics=0
     ;