diff --git a/library/ssl_misc.h b/library/ssl_misc.h
index cc19f47..e4966f0 100644
--- a/library/ssl_misc.h
+++ b/library/ssl_misc.h
@@ -971,7 +971,13 @@
                              unsigned update_hs_digest );
 int mbedtls_ssl_fetch_input( mbedtls_ssl_context *ssl, size_t nb_want );
 
-int mbedtls_ssl_write_handshake_msg( mbedtls_ssl_context *ssl );
+int mbedtls_ssl_write_handshake_msg_ext( mbedtls_ssl_context *ssl,
+                                         int update_checksum );
+static inline int mbedtls_ssl_write_handshake_msg( mbedtls_ssl_context *ssl )
+{
+    return( mbedtls_ssl_write_handshake_msg_ext( ssl, 1 /* update checksum */ ) );
+}
+
 int mbedtls_ssl_write_record( mbedtls_ssl_context *ssl, uint8_t force_flush );
 int mbedtls_ssl_flush_output( mbedtls_ssl_context *ssl );