diff --git a/doc/jemalloc.xml.in b/doc/jemalloc.xml.in
index e8a57225..02961f6b 100644
--- a/doc/jemalloc.xml.in
+++ b/doc/jemalloc.xml.in
@@ -853,9 +853,9 @@ for (i = 0; i < nbins; i++) {
         junk-filled if the <link
         linkend="opt.junk"><mallctl>opt.junk</mallctl></link> option is
         enabled.  This feature is of particular use in combination with <ulink
-        url="http://http://valgrind.org/">Valgrind</ulink>, which can detect
-        attempts to access quarantined objects.  This is intended for debugging
-        and will impact performance negatively.  The default quarantine size is
+        url="http://valgrind.org/">Valgrind</ulink>, which can detect attempts
+        to access quarantined objects.  This is intended for debugging and will
+        impact performance negatively.  The default quarantine size is
         0.</para></listitem>
       </varlistentry>
 
@@ -871,11 +871,11 @@ for (i = 0; i < nbins; i++) {
         <link linkend="opt.junk"><mallctl>opt.junk</mallctl></link> option is
         enabled, the redzones are checked for corruption during deallocation.
         However, the primary intended purpose of this feature is to be used in
-        combination with <ulink
-        url="http://http://valgrind.org/">Valgrind</ulink>, which needs
-        redzones in order to do effective buffer overflow/underflow detection.
-        This option is intended for debugging and will impact performance
-        negatively.  This option is disabled by default.</para></listitem>
+        combination with <ulink url="http://valgrind.org/">Valgrind</ulink>,
+        which needs redzones in order to do effective buffer overflow/underflow
+        detection.  This option is intended for debugging and will impact
+        performance negatively.  This option is disabled by
+        default.</para></listitem>
       </varlistentry>
 
       <varlistentry id="opt.zero">
@@ -915,14 +915,14 @@ for (i = 0; i < nbins; i++) {
           <literal>r-</literal>
           [<option>--enable-valgrind</option>]
         </term>
-        <listitem><para><ulink
-        url="http://http://valgrind.org/">Valgrind</ulink> support
-        enabled/disabled.  If enabled, several other options are automatically
-        modified during options processing to work well with Valgrind: <link
-        linkend="opt.junk"><mallctl>opt.junk</mallctl></link> and <link
-        linkend="opt.zero"><mallctl>opt.zero</mallctl></link> are set to false,
-        <link linkend="opt.quarantine"><mallctl>opt.quarantine</mallctl></link>
-        is set to 16 MiB, and <link
+        <listitem><para><ulink url="http://valgrind.org/">Valgrind</ulink>
+        support enabled/disabled.  If enabled, several other options are
+        automatically modified during options processing to work well with
+        Valgrind: <link linkend="opt.junk"><mallctl>opt.junk</mallctl></link>
+        and <link linkend="opt.zero"><mallctl>opt.zero</mallctl></link> are set
+        to false, <link
+        linkend="opt.quarantine"><mallctl>opt.quarantine</mallctl></link> is
+        set to 16 MiB, and <link
         linkend="opt.redzone"><mallctl>opt.redzone</mallctl></link> is set to
         true.  This option is disabled by default.</para></listitem>
       </varlistentry>
@@ -1854,10 +1854,10 @@ malloc_conf = "xmalloc:true";]]></programlisting>
     <para>This implementation does not provide much detail about the problems
     it detects, because the performance impact for storing such information
     would be prohibitive.  However, jemalloc does integrate with the most
-    excellent <ulink url="http://http://valgrind.org/">Valgrind</ulink> tool if
-    the <option>--enable-valgrind</option> configuration option is enabled and
-    the <link linkend="opt.valgrind"><mallctl>opt.valgrind</mallctl></link>
-    option is enabled.</para>
+    excellent <ulink url="http://valgrind.org/">Valgrind</ulink> tool if the
+    <option>--enable-valgrind</option> configuration option is enabled and the
+    <link linkend="opt.valgrind"><mallctl>opt.valgrind</mallctl></link> option
+    is enabled.</para>
   </refsect1>
   <refsect1 id="diagnostic_messages">
     <title>DIAGNOSTIC MESSAGES</title>