diff --git a/editions/prerelease/tiddlers/Explore.tid b/editions/prerelease/tiddlers/Explore.tid
index 139b8b3a0..a969ec491 100644
--- a/editions/prerelease/tiddlers/Explore.tid
+++ b/editions/prerelease/tiddlers/Explore.tid
@@ -32,5 +32,6 @@ caption: Explore
 </ol>
 \end
 
+<div class="tc-table-of-contents">
 <<treenode "$:/">>
-
+</div>