diff --git a/Documentation/announce.texi b/Documentation/announce.texi
index 21f859353..c33ac5bd6 100644
--- a/Documentation/announce.texi
+++ b/Documentation/announce.texi
@@ -66,6 +66,8 @@ to write a test suite using dejagnu.
   i386-unknown-linux
   i386-sun-solaris2.4
   i386-unknown-sysv4.0
+  Ultrix 4.2
+  HP/UX 9.01
 @end smallexample
 
 It is known not to work with: