diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index d183efaf9063..bbe391525530 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -2557,8 +2557,10 @@ int hci_register_dev(struct hci_dev *hdev)
 		return id;
 
 	error = dev_set_name(&hdev->dev, "hci%u", id);
-	if (error)
+	if (error) {
+		ida_free(&hci_index_ida, id);
 		return error;
+	}
 
 	hdev->name = dev_name(&hdev->dev);
 	hdev->id = id;