diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index 6c401b5..0b072e6 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -1411,7 +1411,7 @@
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
 
     ssl->state = MBEDTLS_SSL_HELLO_REQUEST;
-    ssl->flags = 0;
+    ssl->flags &= MBEDTLS_SSL_CONTEXT_FLAGS_KEEP_AT_SESSION;
     ssl->tls_version = ssl->conf->max_tls_version;
 
     mbedtls_ssl_session_reset_msg_layer(ssl, partial);