diff --git a/quiche/common/quiche_feature_flags_list.h b/quiche/common/quiche_feature_flags_list.h
index ca1c819..063e3c4 100755
--- a/quiche/common/quiche_feature_flags_list.h
+++ b/quiche/common/quiche_feature_flags_list.h
@@ -67,7 +67,7 @@
 QUICHE_FLAG(bool, quiche_reloadable_flag_quic_use_received_client_addresses_cache, true, true, "If true, use a LRU cache to record client addresses of packets received on server's original address.")
 QUICHE_FLAG(bool, quiche_restart_flag_quic_client_cert_support, false, true, "If true, enables dynamic client certs in QUIC.")
 QUICHE_FLAG(bool, quiche_restart_flag_quic_dispatcher_close_connection_on_invalid_ack, false, false, "An invalid ack is an ack that the peer sent for a packet that was not sent by the dispatcher. If true, the dispatcher will close the connection if it receives an invalid ack.")
-QUICHE_FLAG(bool, quiche_restart_flag_quic_set_credential_ex_data, false, false, "If true, TlsServerConnection::AddCertChain will add CredentialExData as the ex_data of the SSL_CREDENTIAL.")
+QUICHE_FLAG(bool, quiche_restart_flag_quic_set_credential_ex_data, false, true, "If true, TlsServerConnection::AddCertChain will add CredentialExData as the ex_data of the SSL_CREDENTIAL.")
 QUICHE_FLAG(bool, quiche_restart_flag_quic_shed_tls_handshake_config, true, true, "If true, QUIC connections will call SSL_set_shed_handshake_config to drop BoringSSL handshake state after the handshake finishes in order to save memory.")
 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.")