1 files changed, 1 insertions, 0 deletions
diff --git a/mandoc.h b/mandoc.h
index 5d28bf42..37859b91 100644
--- a/mandoc.h
+++ b/mandoc.h
@@ -47,6 +47,7 @@ enum	mandocerr {
 	MANDOCERR_STYLE, /* ===== start of style suggestions ===== */
 
 	MANDOCERR_MACRO_USELESS, /* useless macro: macro */
+	MANDOCERR_BX, /* consider using OS macro: macro */
 
 	MANDOCERR_WARNING, /* ===== start of warnings ===== */