diff --git a/html/docs/include/settings/trace_format.html b/html/docs/include/settings/trace_format.html
index b0f0d988..27e06784 100644
--- a/html/docs/include/settings/trace_format.html
+++ b/html/docs/include/settings/trace_format.html
@@ -14,6 +14,8 @@
 </td></tr>
 
 <tr><td class='ctr'>2</td><td>writes a trace formatted in (simple) HTML.</td></tr>
+
+<tr><td class='ctr'>3</td><td>writes a trace in flamegraph format.</td></tr>
 </table>
 <p>
 Fields for the computerized format, depend on the record type.