diff --git a/share/man/man4/tcp.4 b/share/man/man4/tcp.4
index cd6516ad7be6..a33e8fb37cc1 100644
--- a/share/man/man4/tcp.4
+++ b/share/man/man4/tcp.4
@@ -258,8 +258,7 @@ on writes to the specified socket.
 Outgoing traffic is digested;
 digests on incoming traffic are verified if the
 .Va net.inet.tcp.signature_verify_input
-.Xr sysctl 3
-is nonzero.
+sysctl is nonzero.
 The current default behavior for the system is to respond to a system
 advertising this option with TCP-MD5; this may change.
 .Pp