diff --git a/hal/tls/mbedtls/tls_mbedtls.c b/hal/tls/mbedtls/tls_mbedtls.c
index 671ee117..e7641aa4 100644
--- a/hal/tls/mbedtls/tls_mbedtls.c
+++ b/hal/tls/mbedtls/tls_mbedtls.c
@@ -297,7 +297,7 @@ TLSConfiguration_create()
 void
 TLSConfiguration_setClientMode(TLSConfiguration self)
 {
-    self->conf.endpoint = MBEDTLS_SSL_IS_CLIENT;
+    mbedtls_ssl_conf_endpoint(&(self->conf), MBEDTLS_SSL_IS_CLIENT);
 }
 
 void