diff --git a/library/ssl_tls13_generic.c b/library/ssl_tls13_generic.c
index bac1178..c8f6dc7 100644
--- a/library/ssl_tls13_generic.c
+++ b/library/ssl_tls13_generic.c
@@ -66,10 +66,10 @@
     return( ret );
 }
 
-void mbedtls_ssl_tls13_add_hs_msg_to_checksum( mbedtls_ssl_context *ssl,
-                                               unsigned hs_type,
-                                               unsigned char const *msg,
-                                               size_t msg_len )
+void mbedtls_ssl_tls1_3_add_hs_msg_to_checksum( mbedtls_ssl_context *ssl,
+                                                unsigned hs_type,
+                                                unsigned char const *msg,
+                                                size_t msg_len )
 {
     mbedtls_ssl_tls13_add_hs_hdr_to_checksum( ssl, hs_type, msg_len );
     ssl->handshake->update_checksum( ssl, msg, msg_len );