diff --git a/reference/array/functions/next.xml b/reference/array/functions/next.xml
index ccd9ac8c9e..b0cc5340dc 100644
--- a/reference/array/functions/next.xml
+++ b/reference/array/functions/next.xml
@@ -76,8 +76,7 @@ $mode = end($transport);     // $mode = 'plane';
    </simpara>
    <simpara>
     To still use <function>next</function> and properly check if the end of the array 
-    has been reached, the <function>key</function> of the <function>next</function> 
-    element should be checked to be strictly different from &null;.
+    has been reached, verify that the <function>key</function> is &null;.
    </simpara>
   </note>
  </refsect1>
diff --git a/reference/array/functions/prev.xml b/reference/array/functions/prev.xml
index f6eea7d4a0..cc5d4aa7fb 100644
--- a/reference/array/functions/prev.xml
+++ b/reference/array/functions/prev.xml
@@ -69,8 +69,8 @@ $mode = end($transport);     // $mode = 'plane';
    <simpara>
     The beginning of an array is indistinguishable from a
     <type>boolean</type> &false; element. To make the distinction, check that 
-    the <function>key</function> of the <function>prev</function> element is 
-    strictly different from <type>null</type>.
+    the <function>key</function> of the <function>prev</function> element is not
+    &null;.
    </simpara>
   </note>
  </refsect1>