diff --git a/src/config.xml b/src/config.xml
index a62040bd89c..8820fe79a74 100644
--- a/src/config.xml
+++ b/src/config.xml
@@ -667,7 +667,7 @@ Go to the <a href="commands.html">next</a> section or return to the
 ]]>
       </docs>
     </option>
-    <option type='int' id='TOC_INCLUDE_HEADINGS' minval='0' maxval='99' defval='0' depends='MARKDOWN_SUPPORT'>
+    <option type='int' id='TOC_INCLUDE_HEADINGS' minval='0' maxval='99' defval='5' depends='MARKDOWN_SUPPORT'>
       <docs>
 <![CDATA[
  When the \c TOC_INCLUDE_HEADINGS tag is set to a non-zero value, all headings