--- tmac/doc-common	Thu Apr 15 08:09:22 2004
+++ tmac/doc-common	Wed Jun  2 12:53:58 2004
@@ -512,6 +512,9 @@
 .      el \
 .        tm mdoc warning: .Os: Unknown NetBSD version `\$2' (#\n[.c])
 .  \}\}
+.  el \{ .ie "\$1"Darwin" \{\
+.    ds doc-operating-system Darwin
+.  \}\}
 .  el \{\
 .    ds doc-operating-system \$1
 .    if !"\$2"" \
