diff --git a/include/mbedtls/ssl_internal.h b/include/mbedtls/ssl_internal.h
index 288297e..18f9f7e 100644
--- a/include/mbedtls/ssl_internal.h
+++ b/include/mbedtls/ssl_internal.h
@@ -1093,4 +1093,6 @@
 
 void mbedtls_ssl_handshake_wrapup_free_hs_transform( mbedtls_ssl_context *ssl );
 
+int mbedtls_ssl_start_renegotiation( mbedtls_ssl_context *ssl );
+
 #endif /* ssl_internal.h */