diff --git a/libipcamera/Camera.go b/libipcamera/Camera.go
index 85aa2c8..1ab2496 100644
--- a/libipcamera/Camera.go
+++ b/libipcamera/Camera.go
@@ -34,6 +34,8 @@ const (
 	LOGIN_ACCEPT          = 0x0111
 	ALIVE_REQUEST         = 0x0112
 	ALIVE_RESPONSE        = 0x0113
+	DISCOVERY_REQUEST     = 0x0114
+	DISCOVERY_RESPONSE    = 0x0115
 	START_PREVIEW         = 0x01FF
 	REQUEST_FILE_LIST     = 0xA025
 	FILE_LIST_CONTENT     = 0xA026