diff --git a/quiche/common/quiche_feature_flags_list.h b/quiche/common/quiche_feature_flags_list.h
index d43b973..20b927c 100755
--- a/quiche/common/quiche_feature_flags_list.h
+++ b/quiche/common/quiche_feature_flags_list.h
@@ -39,7 +39,7 @@
 QUICHE_FLAG(bool, quiche_reloadable_flag_quic_fix_timeouts, true, true, "If true, postpone setting handshake timeout to infinite to handshake complete.")
 QUICHE_FLAG(bool, quiche_reloadable_flag_quic_heapless_key_derivation, false, false, "If true, QUIC key derivation uses heapless crypto utils.")
 QUICHE_FLAG(bool, quiche_reloadable_flag_quic_heapless_obfuscator, true, true, "If true, generates QUIC initial obfuscators with no heap allocations.")
-QUICHE_FLAG(bool, quiche_reloadable_flag_quic_heapless_static_parser, false, true, "If true, stops parsing immediately on unknown version, to avoid a potential malloc when parsing the connection ID")
+QUICHE_FLAG(bool, quiche_reloadable_flag_quic_heapless_static_parser, true, true, "If true, stops parsing immediately on unknown version, to avoid a potential malloc when parsing the connection ID")
 QUICHE_FLAG(bool, quiche_reloadable_flag_quic_ignore_gquic_probing, true, true, "If true, QUIC server will not respond to gQUIC probing packet(PING + PADDING) but treat it as a regular packet.")
 QUICHE_FLAG(bool, quiche_reloadable_flag_quic_limit_new_streams_per_loop_2, true, true, "If true, when the peer sends connection options \\\'SLP1\\\', \\\'SLP2\\\' and \\\'SLPF\\\', internet facing GFEs will only allow a limited number of new requests to be processed per event loop, and postpone the rest to the following event loops. Also guard QuicConnection to iterate through all decrypters at each encryption level to get cipher id for a request.")
 QUICHE_FLAG(bool, quiche_reloadable_flag_quic_no_path_degrading_before_handshake_confirmed, true, true, "If true, an endpoint does not detect path degrading or blackholing until handshake gets confirmed.")