diff --git a/reference/datetime/functions/mktime.xml b/reference/datetime/functions/mktime.xml
index 45c22041a..1eb24d8ef 100644
--- a/reference/datetime/functions/mktime.xml
+++ b/reference/datetime/functions/mktime.xml
@@ -1,4 +1,4 @@
-<<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <!-- $Revision$ -->
 <refentry xml:id="function.mktime" xmlns="http://docbook.org/ns/docbook">
  <refnamediv>