1 files changed, 1 insertions, 0 deletions
diff --git a/libmdoc.h b/libmdoc.h
index a23b2366..cf3a20bb 100644
--- a/libmdoc.h
+++ b/libmdoc.h
@@ -24,6 +24,7 @@ enum	mdoc_next {
 
 struct	mdoc {
 	struct mparse	 *parse; /* parse pointer */
+	char		 *defos; /* default argument for .Os */
 	int		  flags; /* parse flags */
 #define	MDOC_HALT	 (1 << 0) /* error in parse: halt */
 #define	MDOC_LITERAL	 (1 << 1) /* in a literal scope */