diff --git a/functions/exec.xml b/functions/exec.xml
index 2e3371e149..04f7cb9bb6 100644
--- a/functions/exec.xml
+++ b/functions/exec.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.25 $ -->
+<!-- $Revision: 1.26 $ -->
  <reference id="ref.exec">
   <title>Program Execution functions</title>
   <titleabbrev>Program Execution</titleabbrev>
@@ -304,7 +304,8 @@ system("touch \"/tmp/$f\"; ls -l \"/tmp/$f\""); // and here we do, so we use quo
      </funcprototype>
     </funcsynopsis>
     <para>
-     &warn.undocumented.func;
+     This function is identical to the <link
+     linkend="language.operators.execution">backtick operator</link>.
     </para>
    </refsect1>
   </refentry>