diff --git a/ChangeLog b/ChangeLog
index 4b1630944a..2d892281c0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Mon Jan 20 17:50:05 2003  Akinori MUSHA  <knu@iDaemons.org>
+
+	* mdoc2man.rb (parse_macro): Understand .Ux.
+
 Mon Jan 20 17:32:56 2003  Akinori MUSHA  <knu@iDaemons.org>
 
 	* mdoc2man.rb: New file.  A mdoc to man converter ported from
diff --git a/mdoc2man.rb b/mdoc2man.rb
index b1356819ff..1999b85693 100755
--- a/mdoc2man.rb
+++ b/mdoc2man.rb
@@ -173,6 +173,9 @@ def parse_macro(line)
 
       $reference = false
       break
+    when 'Ux'
+      retval << "UNIX"
+      next
     end
 
     if $reference