diff --git a/quiche/common/quiche_feature_flags_list.h b/quiche/common/quiche_feature_flags_list.h
index 3217e69..1d45e52 100755
--- a/quiche/common/quiche_feature_flags_list.h
+++ b/quiche/common/quiche_feature_flags_list.h
@@ -60,7 +60,7 @@
 QUICHE_FLAG(bool, quiche_restart_flag_quic_support_release_time_for_gso, false, false, "If true, QuicGsoBatchWriter will support release time if it is available and the process has the permission to do so.")
 QUICHE_FLAG(bool, quiche_restart_flag_quic_testonly_default_false, false, false, "A testonly restart flag that will always default to false.")
 QUICHE_FLAG(bool, quiche_restart_flag_quic_testonly_default_true, true, true, "A testonly restart flag that will always default to true.")
-QUICHE_FLAG(bool, quiche_restart_flag_quic_use_new_qpack_blocking_manager, false, true, "If true, QUIC will use NewQpackBlockingManager instead of QpackBlockingManager.")
+QUICHE_FLAG(bool, quiche_restart_flag_quic_use_new_qpack_blocking_manager, true, true, "If true, QUIC will use NewQpackBlockingManager instead of QpackBlockingManager.")
 
 #endif
 // clang-format on