diff --git a/_Sidebar.md b/_Sidebar.md
index 2ac2d68..f56148a 100644
--- a/_Sidebar.md
+++ b/_Sidebar.md
@@ -6,6 +6,7 @@
         - [5-Stage Pipelined](Five-Stage-Pipelined-Datapath)
     - Datapath units
     	- [ALU](ALU)
+        - [Extend](Extend)
     - Interfaces
     	- Instruction Memory Interface
         - Data Memory Interface