diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index 03f2a9126a5dc6c9df1316dd1d680c00ce7ca7a8..b90eec5e9c0649de8b255f1b5f079823ddde2645 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -1510,6 +1510,8 @@ struct hci_ev_sync_train_complete {
 	__u8	status;
 } __packed;
 
+#define HCI_EV_SLAVE_PAGE_RESP_TIMEOUT	0x54
+
 /* Low energy meta events */
 #define LE_CONN_ROLE_MASTER	0x00