diff --git a/dicmote.h b/dicmote.h
index 4935202..796a60f 100644
--- a/dicmote.h
+++ b/dicmote.h
@@ -34,6 +34,8 @@
 #define DICMOTE_PACKET_NOP_REASON_NOT_IMPLEMENTED 1
 #define DICMOTE_PACKET_NOP_REASON_NOT_RECOGNIZED 2
 #define DICMOTE_PACKET_NOP_REASON_ERROR_LIST_DEVICES 3
+#define DICMOTE_PACKET_NOP_REASON_OPEN_OK 4
+#define DICMOTE_PACKET_NOP_REASON_OPEN_ERROR 5
 
 #pragma pack(push, 1)