diff --git a/library/ssl_tls12_server.c b/library/ssl_tls12_server.c
index f5d0d79632..d2ee9a0760 100644
--- a/library/ssl_tls12_server.c
+++ b/library/ssl_tls12_server.c
@@ -950,6 +950,7 @@ static int ssl_parse_client_hello(mbedtls_ssl_context *ssl)
 #endif
             ) {
             if (ret == MBEDTLS_ERR_SSL_UNEXPECTED_RECORD) {
+                MBEDTLS_SSL_DEBUG_MSG(1, ("mapping UNEXPECTED_RECORD to UNEXPECTED_MESSAGE"));
                 ret = MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE;
             }
         }