diff --git a/src/smblib/smbdefs.h b/src/smblib/smbdefs.h
index f14445b850a4f5699497ec938ac23048b26f98d5..ef5650a02c8f20c3321ede571a9100b8c0466dad 100644
--- a/src/smblib/smbdefs.h
+++ b/src/smblib/smbdefs.h
@@ -273,6 +273,8 @@
 #define RFC822MSGID 		0xb1
 #define RFC822REPLYID		0xb2
 #define RFC822TO			0xb3
+#define RFC822FROM			0xb4
+#define RFC822REPLYTO		0xb5
 
 #define USENETPATH			0xc0
 #define USENETNEWSGROUPS	0xc1