1 files changed, 1 insertions, 0 deletions

diff --git a/mdoc.h b/mdoc.h
index c6c03d7b..fa3db9d7 100644
--- a/mdoc.h
+++ b/mdoc.h
@@ -224,6 +224,7 @@ enum	mdoc_warn {
 	WARN_SEC_OO,
 	WARN_ARGS_GE1,
 	WARN_ARGS_EQ0,
+	WARN_COMPAT_TROFF
 };
 
 struct	mdoc_arg {