diff --git a/share/man/man4/pf.4 b/share/man/man4/pf.4
--- a/share/man/man4/pf.4
+++ b/share/man/man4/pf.4
@@ -37,6 +37,10 @@
 .Cd "options PF_DEFAULT_TO_DROP"
 .Pp
 In
+.Xr rc.conf 5 :
+.Cd pf_enable="YES"
+.Pp
+In
 .Xr loader.conf 5 :
 .Cd net.pf.states_hashsize
 .Cd net.pf.source_nodes_hashsize