diff --git a/reference/array/functions/array-change-key-case.xml b/reference/array/functions/array-change-key-case.xml
index b9e5bd3a7d..26d62a5bfb 100644
--- a/reference/array/functions/array-change-key-case.xml
+++ b/reference/array/functions/array-change-key-case.xml
@@ -50,7 +50,7 @@
  <refsect1 role="returnvalues">
   &reftitle.returnvalues;
   <para>
-   Returns an array with its keys lower or uppercased, or &false; if
+   Returns an array with its keys lower or uppercased, or &null; if
    <parameter>array</parameter> is not an array.
   </para>
  </refsect1>