diff --git a/_Sidebar.md b/_Sidebar.md
index 99faa8c..7a347d5 100644
--- a/_Sidebar.md
+++ b/_Sidebar.md
@@ -147,6 +147,7 @@
 * Software Dev Guides
   * [Code contribution rules](Code-contribution-rules)
   * [Create a Simple App](Create-a-simple-app)
+  * [Building External Apps](Building-external-apps)
   * [Widgets](Widgets)
   * [SD Card](SD-Card-(DEV))
   * [Access Radio Hardware](Access-Radio-Hardware)