diff --git a/quic/core/quic_flags_list.h b/quic/core/quic_flags_list.h
index da1c575..06ce700 100644
--- a/quic/core/quic_flags_list.h
+++ b/quic/core/quic_flags_list.h
@@ -80,4 +80,4 @@
 QUIC_FLAG(FLAGS_quic_restart_flag_quic_testonly_default_false, false)
 QUIC_FLAG(FLAGS_quic_restart_flag_quic_testonly_default_true, true)
 QUIC_FLAG(FLAGS_quic_restart_flag_quic_time_wait_list_support_multiple_cid_v2, false)
-QUIC_FLAG(FLAGS_quic_restart_flag_quic_use_reference_counted_sesssion_map, false)
+QUIC_FLAG(FLAGS_quic_restart_flag_quic_use_reference_counted_sesssion_map, true)