diff --git a/reference/datetime/datetimezone/listidentifiers.xml b/reference/datetime/datetimezone/listidentifiers.xml
index 8c06d50e99..bc67735594 100644
--- a/reference/datetime/datetimezone/listidentifiers.xml
+++ b/reference/datetime/datetimezone/listidentifiers.xml
@@ -5,7 +5,7 @@
  <refnamediv>
   <refname>DateTimeZone::listIdentifiers</refname>
   <refname>timezone_identifiers_list</refname>
-  <refpurpose>Returns numerically index array with all timezone identifiers</refpurpose>
+  <refpurpose>Returns a numerically indexed array containing all defined timezone identifiers</refpurpose>
  </refnamediv>
  <refsect1 role="description">
   &reftitle.description;