diff --git a/sbin/ifconfig/ifconfig.8 b/sbin/ifconfig/ifconfig.8
index a7b148a04466..eaab8fa46481 100644
--- a/sbin/ifconfig/ifconfig.8
+++ b/sbin/ifconfig/ifconfig.8
@@ -28,7 +28,7 @@
 .\"     From: @(#)ifconfig.8	8.3 (Berkeley) 1/5/94
 .\" $FreeBSD$
 .\"
-.Dd February 20, 2010
+.Dd May 14, 2010
 .Dt IFCONFIG 8
 .Os
 .Sh NAME
@@ -1278,6 +1278,10 @@ Quality of Service (QoS).
 Indicates that the station is using QoS encapsulation for
 data frame.
 QoS encapsulation is enabled only when WME mode is enabled.
+.It Li S
+Short Preamble.
+Indicates that the station is doing short preamble to optionally
+improve throughput performance with 802.11g and 802.11b.
 .It Li T
 Transitional Security Network (TSN).
 Indicates that the station associated using TSN; see also
@@ -1352,6 +1356,10 @@ Quality of Service (QoS).
 Indicates that the station is using QoS encapsulation for
 data frame.
 QoS encapsulation is enabled only when WME mode is enabled.
+.It Li S
+Short Preamble.
+Indicates that the station is doing short preamble to optionally
+improve throughput performance with 802.11g and 802.11b.
 .It Li T
 Transitional Security Network (TSN).
 Indicates that the station associated using TSN; see also