diff --git a/sbin/sysctl/sysctl.8 b/sbin/sysctl/sysctl.8
index d50b23e42dfb..92f39b2b91f6 100644
--- a/sbin/sysctl/sysctl.8
+++ b/sbin/sysctl/sysctl.8
@@ -227,6 +227,7 @@ definitions for fourth level UDP identifiers
 .Sh SEE ALSO
 .Xr sysctl 3
 .Xr blackhole 4
+.Xr sysctl.conf 5
 .Sh BUGS
 .Nm Sysctl
 presently exploits an undocumented interface to the kernel