diff --git a/share/man/man9/kobj.9 b/share/man/man9/kobj.9
index 1c2c33ba720..addf87eb967 100644
--- a/share/man/man9/kobj.9
+++ b/share/man/man9/kobj.9
@@ -122,8 +122,10 @@ The size argument to
 specifies how much memory should be allocated for each object.
 .Sh HISTORY
 Some of the concepts for this interface appeared in the device
-framework used for the alpha port of FreeBSD 3.0 and more widely in
-FreeBSD 4.0.
+framework used for the alpha port of
+.Fx 3.0
+and more widely in
+.Fx 4.0 .
 .Sh AUTHORS
 This man page was written by
 .An Doug Rabson .