diff --git a/BUGS b/BUGS
index 70aeb9f..24e6639 100644
--- a/BUGS
+++ b/BUGS
@@ -1,5 +1,5 @@
 known problems/assumptions:
- - does not handle protocols other than ICMP, UDP, TCP and GRE
+ - does not handle protocols other than ICMP, UDP, TCP and GRE/ESP
  - assumes the handset has its own (routed) /64 ipv6 subnet
  - assumes the /128 ipv6 subnet it generates can use the nat64 gateway
  - assumes the nat64 gateway has the ipv4 address in the last 32 bits of the ipv6 address (that it uses a /96 plat subnet)