diff --git a/share/man/man4/re.4 b/share/man/man4/re.4
index a4a7255d9de4..c269403cd419 100644
--- a/share/man/man4/re.4
+++ b/share/man/man4/re.4
@@ -30,7 +30,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd January 14, 2006
+.Dd February 9, 2009
 .Dt RE 4
 .Os
 .Sh NAME
@@ -169,6 +169,16 @@ USRobotics USR997902 Gigabit Ethernet (8169S)
 .It
 Xterasys XN-152 10/100/1000 NIC (8169)
 .El
+.Sh LOADER TUNABLES
+Tunables can be set at the
+.Xr loader 8
+prompt before booting the kernel or stored in
+.Xr loader.conf 5 .
+.Bl -tag -width "xxxxxx"
+.It Va hw.re.msi_disable
+This tunable disables MSI support on the Ethernet hardware.
+The default value is 0.
+.El
 .Sh DIAGNOSTICS
 .Bl -diag
 .It "re%d: couldn't map memory"