diff --git a/tools/doc/index_template.md.html b/tools/doc/index_template.md.html
index 8f1cb35..771901d 100644
--- a/tools/doc/index_template.md.html
+++ b/tools/doc/index_template.md.html
@@ -673,6 +673,8 @@ Time
 Threading
 ------------------------------------------------------------------
 
+Thread
+
 <a name="CLASS_Thread"></a>
 <details><summary>Thread</summary>