diff --git a/lib/http_negotiate.c b/lib/http_negotiate.c
index 5127e6480..0bbe4364f 100644
--- a/lib/http_negotiate.c
+++ b/lib/http_negotiate.c
@@ -243,7 +243,7 @@ int Curl_input_negotiate(struct connectdata *conn, bool proxy,
                                       &neg_ctx->context,
                                       neg_ctx->server_name,
                                       GSS_C_NO_OID,
-                                      0,
+                                      GSS_C_MUTUAL_FLAG | GSS_C_REPLAY_FLAG,
                                       0,
                                       GSS_C_NO_CHANNEL_BINDINGS,
                                       &input_token,