diff --git a/doc/reference.md b/doc/reference.md
index 98f460131..a3eeb601a 100644
--- a/doc/reference.md
+++ b/doc/reference.md
@@ -2,9 +2,7 @@
 title: Reference
 ---
 
-# Table of Contents
-
- * [title: Reference](#title-reference)
+## Table of Contents
  * [Digital IO](#digital-io)
  * [Analog input](#analog-input)
  * [Analog output](#analog-output)