diff --git a/lib/krb5/recvauth.c b/lib/krb5/recvauth.c
index 6390db3d8..caf812c09 100644
--- a/lib/krb5/recvauth.c
+++ b/lib/krb5/recvauth.c
@@ -3,7 +3,7 @@
 RCSID("$Id$");
 
 /*
- *
+ * See `sendauth.c' for the format.
  */
 
 krb5_error_code
diff --git a/lib/krb5/sendauth.c b/lib/krb5/sendauth.c
index fdd7bb9f0..ec41d0786 100644
--- a/lib/krb5/sendauth.c
+++ b/lib/krb5/sendauth.c
@@ -19,7 +19,7 @@ RCSID("$Id$");
  * AP-REQ
  *
  * server -> client
- * 4 bytes - 00 00 00 00 (?)
+ * 4 bytes - 00 00 00 00 (this probably forwarding related?)
  * 4 bytes - length
  * AP-REP
  */