diff --git a/library/ssl_tls13_client.c b/library/ssl_tls13_client.c
index 0190ee5..91f1b0c 100644
--- a/library/ssl_tls13_client.c
+++ b/library/ssl_tls13_client.c
@@ -272,8 +272,8 @@
 
     MBEDTLS_SSL_DEBUG_MSG( 3, ( "offer curve %s", curve_info->name ) );
 
-    if( ( ret = mbedtls_ecdh_setup( &ssl->handshake->ecdh_ctx,
-                                    curve_info->grp_id ) ) != 0 )
+    if( ( ret = mbedtls_ecdh_setup_no_everest( &ssl->handshake->ecdh_ctx,
+                                               curve_info->grp_id ) ) != 0 )
     {
         MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecp_group_load", ret );
         return( ret );