diff --git a/reference/posix/functions/posix-getgrgid.xml b/reference/posix/functions/posix-getgrgid.xml
index 28077440e6..27f9b40ff4 100644
--- a/reference/posix/functions/posix-getgrgid.xml
+++ b/reference/posix/functions/posix-getgrgid.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.2 $ -->
+<!-- $Revision: 1.3 $ -->
 <!-- splitted from ./en/functions/posix.xml, last change in rev 1.2 -->
   <refentry id="function.posix-getgrgid">
    <refnamediv>
@@ -13,7 +13,7 @@
       <methodparam><type>int</type><parameter>gid</parameter></methodparam>
      </methodsynopsis>
     <para>
-     Needs to be written.
+     &warn.undocumented.func;
     </para>
    </refsect1>
   </refentry>