diff --git a/library/ssl_misc.h b/library/ssl_misc.h
index 36f332f..8c3da49 100644
--- a/library/ssl_misc.h
+++ b/library/ssl_misc.h
@@ -2115,7 +2115,8 @@
 int mbedtls_ssl_tls13_write_early_data_ext(mbedtls_ssl_context *ssl,
                                            unsigned char *buf,
                                            const unsigned char *end,
-                                           size_t *out_len);
+                                           size_t *out_len,
+                                           const mbedtls_ssl_session *session);
 
 #if defined(MBEDTLS_SSL_SRV_C)
 #define MBEDTLS_SSL_EARLY_DATA_STATUS_NOT_RECEIVED \