diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index c5fcd13..139ce2a 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -264,6 +264,13 @@
 #define HCI_LK_SMP_IRK			0x82
 #define HCI_LK_SMP_CSRK			0x83
 
+/* ---- HCI Error Codes ---- */
+#define HCI_ERROR_AUTH_FAILURE		0x05
+#define HCI_ERROR_REJ_BAD_ADDR		0x0f
+#define HCI_ERROR_REMOTE_USER_TERM	0x13
+#define HCI_ERROR_LOCAL_HOST_TERM	0x16
+#define HCI_ERROR_PAIRING_NOT_ALLOWED	0x18
+
 /* -----  HCI Commands ---- */
 #define HCI_OP_NOP			0x0000