Index: lib/libc/sys/getdtablesize.2
===================================================================
--- lib/libc/sys/getdtablesize.2
+++ lib/libc/sys/getdtablesize.2
@@ -28,7 +28,7 @@
 .\"     @(#)getdtablesize.2	8.1 (Berkeley) 6/4/93
 .\" $FreeBSD$
 .\"
-.Dd April 24, 2013
+.Dd August 31, 2016
 .Dt GETDTABLESIZE 2
 .Os
 .Sh NAME
@@ -49,6 +49,11 @@
 is the return value minus one.
 Existing file descriptor numbers may be higher
 if the limit was lowered after they were opened.
+.Pp
+This is a legacy interface.
+Applications should use
+.Xr getrlimit 2
+instead.
 .Sh SEE ALSO
 .Xr close 2 ,
 .Xr closefrom 2 ,