diff --git a/quic/core/quic_flags_list.h b/quic/core/quic_flags_list.h
index def3a5c..63f0625 100644
--- a/quic/core/quic_flags_list.h
+++ b/quic/core/quic_flags_list.h
@@ -66,7 +66,7 @@
 QUIC_FLAG(FLAGS_quic_restart_flag_dont_fetch_quic_private_keys_from_leto, false)
 QUIC_FLAG(FLAGS_quic_restart_flag_quic_enable_zero_rtt_for_tls_v2, true)
 QUIC_FLAG(FLAGS_quic_restart_flag_quic_offload_pacing_to_usps2, false)
-QUIC_FLAG(FLAGS_quic_restart_flag_quic_server_temporarily_retain_tls_zero_rtt_keys, false)
+QUIC_FLAG(FLAGS_quic_restart_flag_quic_server_temporarily_retain_tls_zero_rtt_keys, true)
 QUIC_FLAG(FLAGS_quic_restart_flag_quic_session_tickets_always_enabled, true)
 QUIC_FLAG(FLAGS_quic_restart_flag_quic_startup_faster_interval_set, false)
 QUIC_FLAG(FLAGS_quic_restart_flag_quic_support_release_time_for_gso, false)