diff --git a/reference/gmp/functions/gmp-clrbit.xml b/reference/gmp/functions/gmp-clrbit.xml
index d8f2da0b01..320de5c766 100644
--- a/reference/gmp/functions/gmp-clrbit.xml
+++ b/reference/gmp/functions/gmp-clrbit.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.3 $ -->
+<!-- $Revision: 1.4 $ -->
 <!-- splitted from ./en/functions/gmp.xml, last change in rev 1.1 -->
   <refentry id="function.gmp-clrbit">
    <refnamediv>
@@ -29,9 +29,11 @@
      <title><function>gmp_clrbit</function> example</title>
      <programlisting role="php">
 <![CDATA[
+<?php
     $a = gmp_init("0xff");
     gmp_clrbit($a, 0); // index starts at 0, least significant bit
     echo gmp_strval($a) . "\n";
+?>
 ]]>
      </programlisting>
      <para>
diff --git a/reference/gmp/functions/gmp-xor.xml b/reference/gmp/functions/gmp-xor.xml
index 272a379250..69c8fb9db1 100644
--- a/reference/gmp/functions/gmp-xor.xml
+++ b/reference/gmp/functions/gmp-xor.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.3 $ -->
+<!-- $Revision: 1.4 $ -->
 <!-- splitted from ./en/functions/gmp.xml, last change in rev 1.1 -->
   <refentry id="function.gmp-xor">
    <refnamediv>
@@ -20,6 +20,7 @@
      <title><function>gmp_xor</function> example</title>
      <programlisting role="php">
 <![CDATA[
+<?php
     $xor1 = gmp_init("1101101110011101", 2);
     $xor2 = gmp_init("0110011001011001", 2);