diff --git a/doc/my-rfc.txt b/doc/my-rfc.txt
index 189dfe7..36e60ef 100644
--- a/doc/my-rfc.txt
+++ b/doc/my-rfc.txt
@@ -52,6 +52,8 @@ Timestamp :
 
 Site_index : unsigned short (16 bits)
 ~~~~~~~~~~~~
+  Site indexes start at index = 0
+
 
 Clock_size : same size than "Site index" (unsigned short 16 bits)
 ~~~~~~~~~~~~
@@ -83,4 +85,3 @@ Message_data :
 Notes:
 ~~~~~~
 	Timestamps start at time = 0
-	Site indexes start at index = 1