1 files changed, 4 insertions, 2 deletions

diff --git a/src/lib/libssl/bytestring.h b/src/lib/libssl/bytestring.h
index 209bb38e24..93c3df6f10 100644
--- a/src/lib/libssl/bytestring.h
+++ b/src/lib/libssl/bytestring.h
@@ -1,4 +1,4 @@
-/*      $OpenBSD: bytestring.h,v 1.3 2015/02/07 02:02:28 doug Exp $     */
+/*      $OpenBSD: bytestring.h,v 1.4 2015/02/07 06:10:32 doug Exp $     */
 /*
  * Copyright (c) 2014, Google Inc.
  *
@@ -374,7 +374,9 @@ int CBB_add_u24_length_prefixed(CBB *cbb, CBB *out_contents);
 /*
  * CBB_add_asn sets |*out_contents| to a |CBB| into which the contents of an
  * ASN.1 object can be written. The |tag| argument will be used as the tag for
- * the object. It returns one on success or zero on error.
+ * the object. Passing in |tag| number 31 will return in an error since only
+ * single octet identifiers are supported. It returns one on success or zero
+ * on error.
  */
 int CBB_add_asn1(CBB *cbb, CBB *out_contents, uint8_t tag);