diff --git a/surf.1 b/surf.1
index 1c3e3d9..39b8d89 100644
--- a/surf.1
+++ b/surf.1
@@ -280,6 +280,9 @@ frame flattening
 .TP
 .B x X
 custom certificates
+.TP
+.B t T
+strict TLS
 .SH INDICATORS OF WEB PAGE
 The second part of the indicators specifies modes of the web page itself.
 .SS First character: encryption