diff --git a/Supported-Systems.md b/Supported-Systems.md
index 2d3da77..71bdce2 100644
--- a/Supported-Systems.md
+++ b/Supported-Systems.md
@@ -75,7 +75,7 @@ All Mac Plus ROM versions work.
 Like the Plus, the DB25 port of the Portable doesn't provide TERMPOWER so make sure you use the USB connector to provide power.
 Internally, the Portable uses a custom SCSI connector so you must use an adapter.
 
-### IIsi
+### Macintosh IIsi
 
 The IIsi does not provide TERM POWER. It must be powered via the Berg connector or USB on the BluePill.