diff --git a/doc/Readme.auth_b2b b/doc/Readme.auth_b2b
index e8f11c3f..aad91d15 100644
--- a/doc/Readme.auth_b2b
+++ b/doc/Readme.auth_b2b
@@ -39,4 +39,6 @@ Caller            SEMS auth_b2b                123@domainb
 App-Param:
   u - user in B leg
   d - domain in B leg
-  p - password for auth in B leg (auth user=user)
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+  p - password for auth in B leg (auth user=user)
+
+Alternatively, the account (user/domain/pwd) can be set in auth_b2b.conf.
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