diff --git a/README.md b/README.md
index ca3cdf7..4357c6f 100644
--- a/README.md
+++ b/README.md
@@ -56,6 +56,7 @@ If you want to customise your installation, you can export them or specify them
 - `APPROVE_INSTALL=y`
 - `APPROVE_IP=y`
 - `IPV6_SUPPORT=n`
+- `IP_CHOICE=1`
 - `PORT_CHOICE=1`
 - `PROTOCOL_CHOICE=1`
 - `DNS=1`