diff --git a/monitor/bt.h b/monitor/bt.h
index 2ec2ea0..1859dfb 100644
--- a/monitor/bt.h
+++ b/monitor/bt.h
@@ -2490,6 +2490,14 @@ struct bt_hci_cmd_periodic_adv_sync_trans_params {
 	uint8_t   cte_type;
 } __attribute__ ((packed));
 
+#define BT_HCI_CMD_DEFAULT_PERIODIC_ADV_SYNC_TRANS_PARAMS	0x205d
+struct bt_hci_cmd_default_periodic_adv_sync_trans_params {
+	uint8_t  mode;
+	uint16_t skip;
+	uint16_t sync_timeout;
+	uint8_t  cte_type;
+} __attribute__ ((packed));
+
 #define BT_HCI_EVT_INQUIRY_COMPLETE		0x01
 struct bt_hci_evt_inquiry_complete {
 	uint8_t  status;
diff --git a/monitor/packet.c b/monitor/packet.c
index a389cb8..5305fde 100644
--- a/monitor/packet.c
+++ b/monitor/packet.c
@@ -7653,6 +7653,19 @@ static void le_periodic_adv_sync_trans_params(const void *data, uint8_t size)
 	print_create_sync_cte_type(cmd->cte_type);
 }
 
+static void le_set_default_periodic_adv_sync_trans_params(const void *data,
+								uint8_t size)
+{
+	const struct bt_hci_cmd_default_periodic_adv_sync_trans_params *cmd = data;
+
+	print_sync_mode(cmd->mode);
+	print_field("Skip: 0x%2.2x", cmd->skip);
+	print_field("Sync timeout: %d msec (0x%4.4x)",
+					le16_to_cpu(cmd->sync_timeout) * 10,
+					le16_to_cpu(cmd->sync_timeout));
+	print_create_sync_cte_type(cmd->cte_type);
+}
+
 struct opcode_data {
 	uint16_t opcode;
 	int bit;
@@ -8458,6 +8471,10 @@ static const struct opcode_data opcode_table[] = {
 	{ 0x205c, 328, "LE Periodic Advertising Sync Transfer Parameters",
 				le_periodic_adv_sync_trans_params, 8, true,
 				status_handle_rsp, 3, true},
+	{ 0x205d, 329, "LE Set Default Periodic Advertisng Sync Transfer "
+				"Parameters",
+				le_set_default_periodic_adv_sync_trans_params,
+				6, true, status_rsp, 1, true},
 	{ }
 };