diff --git a/docs/INSTALL b/docs/INSTALL
index 87c7f3d206..006407a449 100644
--- a/docs/INSTALL
+++ b/docs/INSTALL
@@ -790,7 +790,8 @@ PORTS
         - PowerPC Linux
         - PowerPC Mac OS 9
         - PowerPC Mac OS X
-        - SuperH4 Linux 2.6.X
+        - SH4 Linux 2.6.X
+        - SH4 OS21
         - SINIX-Z v5
         - Sparc Linux
         - Sparc Solaris 2.4, 2.5, 2.5.1, 2.6, 7, 8, 9, 10