diff --git a/quic/core/quic_flags_list.h b/quic/core/quic_flags_list.h
index c75f37b..2199105 100644
--- a/quic/core/quic_flags_list.h
+++ b/quic/core/quic_flags_list.h
@@ -24,7 +24,7 @@
 // If true, QUIC will default enable MTU discovery at server, with a target of 1450 bytes.
 QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_enable_mtu_discovery_at_server, false)
 // If true, QUIC won\'t honor the connection option TLPR
-QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_deprecate_tlpr, false)
+QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_deprecate_tlpr, true)
 // If true, QuicGsoBatchWriter will support release time if it is available and the process has the permission to do so.
 QUIC_FLAG(FLAGS_quic_restart_flag_quic_support_release_time_for_gso, false)
 // If true, abort async QPACK header decompression in QuicSpdyStream::Reset() and in QuicSpdyStream::OnStreamReset().