diff --git a/docs/formatnwfilter.html.in b/docs/formatnwfilter.html.in
index d1e5d31dff885cf17accf735bab20aa39a7f1a61..93db5b00bff0ee51ba46a22e9c8e05662189c172 100644
--- a/docs/formatnwfilter.html.in
+++ b/docs/formatnwfilter.html.in
@@ -1779,7 +1779,7 @@
Protocol ID: esp-ipv6
, ah-ipv6
, udplite-ipv6
, all-ipv6