diff --git a/lib/krb5/krb5_address.3 b/lib/krb5/krb5_address.3
index dc97f45bd..1062c3b31 100644
--- a/lib/krb5/krb5_address.3
+++ b/lib/krb5/krb5_address.3
@@ -281,7 +281,9 @@ If
 .Fa ret_len
 if not
 .Dv NULL ,
-it will be filled in length of the string.
+it will be filled in length of the string if size where unlimited (not
+included the final
+.Ql \e0 ) .
 .Pp
 .Fn krb5_parse_address
 Returns the resolving a hostname in