diff --git a/quiche/common/quiche_feature_flags_list.h b/quiche/common/quiche_feature_flags_list.h
index f3dbac2..fd1fd04 100755
--- a/quiche/common/quiche_feature_flags_list.h
+++ b/quiche/common/quiche_feature_flags_list.h
@@ -10,7 +10,7 @@
 
 QUICHE_FLAG(bool, quiche_reloadable_flag_enable_h3_origin_frame, false, true, "If true, enables support for parsing HTTP/3 ORIGIN frames.")
 QUICHE_FLAG(bool, quiche_reloadable_flag_quic_act_upon_invalid_header, true, true, "If true, reject or send error response code upon receiving invalid request or response headers.")
-QUICHE_FLAG(bool, quiche_reloadable_flag_quic_add_ssl_error_stack_to_error_detail, false, true, "If true, when TlsHandshaker::AdvanceHandshake closes connection due to BoringSSL error, it will include a formatted BoringSSL error stack in the error details.")
+QUICHE_FLAG(bool, quiche_reloadable_flag_quic_add_ssl_error_stack_to_error_detail, true, true, "If true, when TlsHandshaker::AdvanceHandshake closes connection due to BoringSSL error, it will include a formatted BoringSSL error stack in the error details.")
 QUICHE_FLAG(bool, quiche_reloadable_flag_quic_add_stream_info_to_idle_close_detail, false, true, "If true, include stream information in idle timeout connection close detail.")
 QUICHE_FLAG(bool, quiche_reloadable_flag_quic_allow_client_enabled_bbr_v2, true, true, "If true, allow client to enable BBRv2 on server via connection option 'B2ON'.")
 QUICHE_FLAG(bool, quiche_reloadable_flag_quic_allow_host_in_request2, false, true, "If true, requests with a host header will be allowed.")