diff --git a/reference/datetime/functions/date-default-timezone-get.xml b/reference/datetime/functions/date-default-timezone-get.xml
index 2ff0ca7c0f..a3ea1a4ad9 100644
--- a/reference/datetime/functions/date-default-timezone-get.xml
+++ b/reference/datetime/functions/date-default-timezone-get.xml
@@ -36,7 +36,7 @@
     <listitem>
      <para>
       Querying the host operating system (if supported and allowed by the OS). This uses an algorithm
-      that has to <strong>guess</strong> the timezone. This is by no means going to work correctly for 
+      that has to <emphasis>guess</emphasis> the timezone. This is by no means going to work correctly for 
       every situation. A warning is shown when this stage is reached. Do not rely on it to be guessed
       correctly, and set <link linkend="ini.date.timezone">date.timezone</link> to the correct timezone
       instead.