1 files changed, 1 insertions, 0 deletions
diff --git a/mdoc.h b/mdoc.h
index be2a0123..ad2edf85 100644
--- a/mdoc.h
+++ b/mdoc.h
@@ -264,6 +264,7 @@ struct	mdoc_node {
 
 #define	MDOC_IGN_SCOPE	 (1 << 0) /* Ignore scope violations. */
 #define	MDOC_IGN_ESCAPE	 (1 << 1) /* Ignore bad escape sequences. */
+#define	MDOC_IGN_MACRO	 (1 << 2) /* Ignore unknown macros. */
 
 /* Call-backs for parse messages. */
 struct	mdoc_cb {