diff --git a/emulator/btdev.c b/emulator/btdev.c
index 38bb037..37b8158 100644
--- a/emulator/btdev.c
+++ b/emulator/btdev.c
@@ -104,6 +104,7 @@ struct btdev {
 	uint8_t  ext_inquiry_fec;
 	uint8_t  ext_inquiry_rsp[240];
 	uint8_t  simple_pairing_mode;
+	uint8_t  ssp_debug_mode;
 	uint8_t  secure_conn_support;
 	uint8_t  le_supported;
 	uint8_t  le_simultaneous;
@@ -1454,6 +1455,7 @@ static void default_cmd(struct btdev *btdev, uint16_t opcode,
 	const struct bt_hci_cmd_le_set_event_mask *lsem;
 	const struct bt_hci_cmd_le_set_adv_data *lsad;
 	const struct bt_hci_cmd_setup_sync_conn *ssc;
+	const struct bt_hci_cmd_write_ssp_debug_mode *wsdm;
 	const struct bt_hci_cmd_le_set_adv_enable *lsae;
 	const struct bt_hci_cmd_le_set_scan_enable *lsse;
 	const struct bt_hci_cmd_le_start_encrypt *lse;
@@ -2370,6 +2372,15 @@ static void default_cmd(struct btdev *btdev, uint16_t opcode,
 		cmd_complete(btdev, opcode, &status, sizeof(status));
 		break;
 
+	case BT_HCI_CMD_WRITE_SSP_DEBUG_MODE:
+		if (btdev->type == BTDEV_TYPE_LE)
+			goto unsupported;
+		wsdm = data;
+		btdev->ssp_debug_mode = wsdm->mode;
+		status = BT_HCI_ERR_SUCCESS;
+		cmd_complete(btdev, opcode, &status, sizeof(status));
+		break;
+
 	case BT_HCI_CMD_LE_RECEIVER_TEST:
 		if (btdev->type == BTDEV_TYPE_BREDR)
 			goto unsupported;