diff --git a/xsl/html.xsl b/xsl/html.xsl
index a0ee2f2..02ed0c1 100644
--- a/xsl/html.xsl
+++ b/xsl/html.xsl
@@ -26,6 +26,7 @@
 
   <xsl:param name="admon.style"/>
   <xsl:param name="admon.graphics">1</xsl:param>
+  <xsl:param name="boostbook.verbose">0</xsl:param>
   <xsl:param name="html.stylesheet" select="'boostbook.css'"/>
   <xsl:param name="navig.graphics" select="1"/>
   <xsl:param name="navig.graphics.extension" select="'.png'"/>
@@ -38,6 +39,7 @@
   <xsl:param name="generate.section.toc.level" select="3"/>
   <xsl:param name="doc.standalone">false</xsl:param>
   <xsl:param name="chunker.output.indent">yes</xsl:param>
+  <xsl:param name="chunk.quietly" select="not($boostbook.verbose)"/>
   <xsl:param name="toc.max.depth">2</xsl:param>
   <xsl:param name="callout.graphics.number.limit">15</xsl:param>
   <xsl:param name = "admon.graphics.path"
diff --git a/xsl/xhtml.xsl b/xsl/xhtml.xsl
index cd72860..dbc1482 100644
--- a/xsl/xhtml.xsl
+++ b/xsl/xhtml.xsl
@@ -26,6 +26,7 @@
 
   <xsl:param name="admon.style"/>
   <xsl:param name="admon.graphics">1</xsl:param>
+  <xsl:param name="boostbook.verbose">0</xsl:param>
   <xsl:param name="html.stylesheet" select="'boostbook.css'"/>
   <xsl:param name="navig.graphics" select="1"/>
   <xsl:param name="navig.graphics.extension" select="'.png'"/>
@@ -38,6 +39,7 @@
   <xsl:param name="generate.section.toc.level" select="3"/>
   <xsl:param name="doc.standalone">false</xsl:param>
   <xsl:param name="chunker.output.indent">yes</xsl:param>
+  <xsl:param name="chunk.quietly" select="not($boostbook.verbose)"/>
   <xsl:param name="toc.max.depth">2</xsl:param>
   <xsl:param name="callout.graphics.number.limit">15</xsl:param>
   <xsl:param name = "admon.graphics.path"