diff --git a/configs/zapata.conf.sample b/configs/zapata.conf.sample
index 5184676e6df3ebe3fd8027310d5a4aa880a9f865..0014242bedab7436263a757a18ee8517fc77f7ef 100644
--- a/configs/zapata.conf.sample
+++ b/configs/zapata.conf.sample
@@ -223,6 +223,7 @@ usecallerid=yes
 ; Type of caller ID signalling in use
 ;     bell     = bell202 as used in US
 ;     v23      = v23 as used in the UK
+;     v23_jp   = v23 as used in Japan
 ;     dtmf     = DTMF as used in Denmark, Sweden and Netherlands
 ;
 ;cidsignalling=bell