diff --git a/sbin/ifconfig/ifconfig.8 b/sbin/ifconfig/ifconfig.8
index 378444ed779f..6cdb45929e11 100644
--- a/sbin/ifconfig/ifconfig.8
+++ b/sbin/ifconfig/ifconfig.8
@@ -48,6 +48,8 @@
 .Nm ifconfig
 .Ar interface
 .Op Ar protocol_family
+.Nm ifconfig
+.Ar -a
 .Sh DESCRIPTION
 .Nm Ifconfig
 is used to assign an address
@@ -260,6 +262,11 @@ the hardware will be re-initialized.
 .Pp
 .Pp
 .Nm Ifconfig
+.Ar -a
+displays information on all interfaces.  When followed by a configuration
+parameter, will also set the configuration on all interfaces.
+.Pp
+.Nm Ifconfig
 displays the current configuration for a network interface
 when no optional parameters are supplied.
 If a protocol family is specified,