1 files changed, 1 insertions, 0 deletions
diff --git a/mandoc.h b/mandoc.h
index 1719eae0..11d0ecfd 100644
--- a/mandoc.h
+++ b/mandoc.h
@@ -257,6 +257,7 @@ enum	mandocerr {
 	MANDOCERR_BADVAL_BAD, /* bad argument value */
 	MANDOCERR_BADVAL_DUPE, /* duplicate argument value */
 	MANDOCERR_TAG, /* no such tag */
+	MANDOCERR_MAN_TMARKDOWN, /* -Tmarkdown unsupported for man(7) input */
 
 	MANDOCERR_SYSERR, /* ===== start of system errors ===== */