diff --git a/src/ca/CAref.html b/src/ca/CAref.html
index 717d28b6b..5f258b158 100644
--- a/src/ca/CAref.html
+++ b/src/ca/CAref.html
@@ -1346,7 +1346,7 @@ the output.</p>
     <tr>
       <td>-m &lt;mask&gt;</td>
       <td>Specify CA event mask to use, with &lt;mask&gt; being any combination
-        of 'v' (value), 'a' (alarm), 'l' (log). Default: va</td>
+        of 'v' (value), 'a' (alarm), 'l' (log), 'p' (property). Default: va</td>
     </tr>
     <tr>
       <td>-p &lt;prio&gt;</td>