diff --git a/include/fmtmsg.h b/include/fmtmsg.h
new file mode 100644
index 0000000..a2cae15
--- /dev/null
+++ b/include/fmtmsg.h
@@ -0,0 +1,38 @@
+#ifndef _FMTMSG_H
+#define _FMTMSG_H
+
+#define MM_HARD 01 /* Source is hardware */
+#define MM_SOFT 02 /* Source is software */
+#define MM_FIRM 04 /* Source is firmware */
+
+#define MM_APPL  010 /* Detected by application */
+#define MM_UTIL  020 /* Detected by utility */
+#define MM_OPSYS 040 /* Detected by operating system */
+
+#define MM_RECOVER 0100 /* Recoverable */
+#define MM_NRECOV  0200 /* Non-recoverable */
+
+#define MM_HALT    01000 /* Caused application to halt */
+#define MM_ERROR   02000 /* A non-fatal fault */
+#define MM_WARNING 04000 /* An unusual non-error condition */
+#define MM_INFO    010000 /* Informative message */
+#define MM_NOSEV   020000 /* No severity provided */
+
+#define MM_PRINT   0100000 /* Display on stderr */
+#define MM_CONSOLE 0200000 /* Display on system console */
+
+#define MM_NULLLBL (char *) 0 /* Null label */
+#define MM_NULLSEV (int) 0 /* Null severity */
+#define MM_NULLMC  (long) 0L /* Null class */
+#define MM_NULLTXT (char *) 0 /* Null message text */
+#define MM_NULLACT (char *) 0 /* Null action */
+#define MM_NULLTAG (char *) 0 /* Null tag */
+
+#define MM_OK    0 /* Function succeeded */
+#define MM_NOTOK 1 /* Function failed completely */
+#define MM_NOMSG 2 /* Could not generate message on stderr */
+#define MM_NOCON 3 /* Could not generate message on console */
+
+int fmtmsg(long, const char *, int, const char *, const char *, const char *);
+
+#endif