diff --git a/src/m/intel386.h b/src/m/intel386.h
index 254213379dd..f359af57311 100644
--- a/src/m/intel386.h
+++ b/src/m/intel386.h
@@ -26,7 +26,7 @@ NOTE-START
 Intel 386 (-machine=intel386 or -machine=is386.h)
 
   The possibilities for -opsystem are: bsd4-2, usg5-2-2, usg5-3,
-  isc2-2, 386-ix, esix, or xenix.
+  isc2-2, 386-ix, esix, sco3.2v4, and xenix.
 
   18.58 should support a wide variety of operating systems.
   Use isc2-2 for Interactive 386/ix version 2.2.