diff --git a/net/bluetooth/hci_sync.c b/net/bluetooth/hci_sync.c
index df2d037970f9..b5897545d795 100644
--- a/net/bluetooth/hci_sync.c
+++ b/net/bluetooth/hci_sync.c
@@ -1150,6 +1150,32 @@ int hci_update_random_address_sync(struct hci_dev *hdev, bool require_privacy,
 	return 0;
 }
 
+static int hci_disable_ext_adv_legacy_instance_sync(struct hci_dev *hdev)
+{
+	struct hci_cp_le_set_ext_adv_enable *cp;
+	struct hci_cp_ext_adv_set *set;
+	u8 data[sizeof(*cp) + sizeof(*set) * 1];
+	u8 size;
+
+	if (!hci_dev_test_flag(hdev, HCI_LE_ADV_0))
+		return 0;
+
+	memset(data, 0, sizeof(data));
+
+	cp = (void *)data;
+	set = (void *)cp->data;
+
+	cp->num_of_sets = 0x01;
+	cp->enable = 0x00;
+
+	set->handle = 0x00;
+
+	size = sizeof(*cp) + sizeof(*set) * cp->num_of_sets;
+
+	return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE,
+				     size, data, HCI_CMD_TIMEOUT);
+}
+
 static int hci_disable_ext_adv_instance_sync(struct hci_dev *hdev, u8 instance)
 {
 	struct hci_cp_le_set_ext_adv_enable *cp;
@@ -1375,6 +1401,10 @@ int hci_setup_ext_adv_instance_sync(struct hci_dev *hdev, u8 instance)
 			return -EINVAL;
 		}
 	} else {
+		err = hci_disable_ext_adv_legacy_instance_sync(hdev);
+		if (err)
+			return err;
+
 		adv = NULL;
 	}