diff --git a/README.md b/README.md
index 3c618f0..3d74219 100644
--- a/README.md
+++ b/README.md
@@ -4,6 +4,7 @@ Some of this ROM files are upgraded (patched) to solve some bugs or add function
 
 Contents:
 
+- [Psion Series 3 and variants](#psion-series-3-and-variants)
 - [Psion Series 3a and variants](#psion-series-3a-and-variants)
 - [Psion Siena](#psion-siena)
 - [Psion Series 3c](#psion-series-3c)