diff --git a/appendices/migration4.xml b/appendices/migration4.xml
index bf13aac6fa..f64f8a7d2b 100644
--- a/appendices/migration4.xml
+++ b/appendices/migration4.xml
@@ -81,10 +81,10 @@
      style warnings that are categorized by the symbolic constant
      <literal>E_NOTICE</literal>.  Then you'll put the following into
      your <filename>php.ini</filename>: <literal>error_reporting =
-     E_ALL & ~ ( E_NOTICE )</literal>.  If you want to suppress
+     E_ALL &amp; ~ ( E_NOTICE )</literal>.  If you want to suppress
      warnings too you add up the appropriate constant within the
      braces using the binary or operator '|':
-     <literal>error_reporting= E_ALL & ~ ( E_NOTICE | E_WARNING
+     <literal>error_reporting= E_ALL &amp; ~ ( E_NOTICE | E_WARNING
      )</literal>.
     </para>
     <warning>