diff --git a/library/ssl_misc.h b/library/ssl_misc.h
index 6206c6f..8b2d50d 100644
--- a/library/ssl_misc.h
+++ b/library/ssl_misc.h
@@ -986,6 +986,14 @@
  */
 void mbedtls_ssl_handshake_free( mbedtls_ssl_context *ssl );
 
+/* set inbound transform of ssl context */
+void mbedtls_ssl_set_inbound_transform( mbedtls_ssl_context *ssl,
+                                        mbedtls_ssl_transform *transform );
+
+/* set outbound transform of ssl context */
+void mbedtls_ssl_set_outbound_transform( mbedtls_ssl_context *ssl,
+                                         mbedtls_ssl_transform *transform );
+
 int mbedtls_ssl_handshake_client_step( mbedtls_ssl_context *ssl );
 int mbedtls_ssl_handshake_server_step( mbedtls_ssl_context *ssl );
 void mbedtls_ssl_handshake_wrapup( mbedtls_ssl_context *ssl );