diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index 97f34d0..7dd8e4d 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -4113,6 +4113,7 @@
  * #if defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE
  *    opaque peer_cert<0..2^24-1>;    // length 0 means no peer cert
  * #else
+ *    uint8 peer_cert_digest_type;
  *    opaque peer_cert_digest<0..2^8-1>
  * #endif
  *     select (endpoint) {