diff --git a/doc/Jamfile.v2 b/doc/Jamfile.v2
index 542ecff..3a43d57 100644
--- a/doc/Jamfile.v2
+++ b/doc/Jamfile.v2
@@ -196,15 +196,15 @@ boostbook sync
     :
         sync_doc
     :
-        <xsl:param>boost.root=../../../..
-        <xsl:param>boost.libraries=../../../libs/libraries.htm
+        <xsl:param>"boost.root=../../../.."
+        <xsl:param>"boost.libraries=../../../libs/libraries.htm"
         <xsl:param>nav.layout=none
         <xsl:param>boost.image=Boost
         <xsl:param>navig.graphics=1
         <xsl:param>chunk.section.depth=2
         <xsl:param>boost.compact.function=0
-        <format>pdf:<xsl:param>boost.url.prefix=http://www.boost.org/doc/libs/release/libs/sync/doc/html
-        <format>pdf:<xsl:param>img.src.path=$(images_location)/
+        <format>pdf:<xsl:param>"boost.url.prefix=http://www.boost.org/doc/libs/release/libs/sync/doc/html"
+        <format>pdf:<xsl:param>"img.src.path=$(images_location)/"
     ;
 
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