diff --git a/doc/modsecurity2-apache-reference.xml b/doc/modsecurity2-apache-reference.xml
index 798c7b34..d5527c2a 100644
--- a/doc/modsecurity2-apache-reference.xml
+++ b/doc/modsecurity2-apache-reference.xml
@@ -2646,7 +2646,8 @@ SecAction setsid:%{REQUEST_COOKIES.PHPSESSID}
     <para>Below is a diagram of the standard Apache Request Cycle. In the
     diagram, the 5 ModSecurity processing phases are shown.</para>
 
-    <para><graphic fileref="apache_request_cycle-modsecurity.jpg" scale="150"
+    <para><graphic contentwidth="5.5in"
+    fileref="apache_request_cycle-modsecurity.jpg" role="" scale=""
     scalefit="" /></para>
 
     <para>In order to select the phase a rule executes during, use the phase
diff --git a/doc/pdf.xsl b/doc/pdf.xsl
index 59bfdcb4..b0ace8a3 100644
--- a/doc/pdf.xsl
+++ b/doc/pdf.xsl
@@ -159,7 +159,7 @@
 
 <xsl:template name="article.titlepage.before.recto">
   <fo:block>&#8203;
-    <fo:external-graphic width="8cm" src="url(modsecurity-logo.png)"/>
+    <fo:external-graphic content-width="8cm" src="url(modsecurity-logo.png)"/>
   </fo:block>
 </xsl:template>