1 files changed, 1 insertions, 0 deletions
diff --git a/mandoc.h b/mandoc.h
index a686799a..0be99722 100644
--- a/mandoc.h
+++ b/mandoc.h
@@ -103,6 +103,7 @@ enum	mandocerr {
 	MANDOCERR_BF_NOFONT, /* missing font type, using \fR: Bf */
 	MANDOCERR_BF_BADFONT, /* unknown font type, using \fR: Bf font */
 	MANDOCERR_PF_SKIP, /* nothing follows prefix: Pf arg */
+	MANDOCERR_RS_EMPTY, /* empty reference block: Rs */
 	MANDOCERR_ARG_STD, /* missing -std argument, adding it: macro */
 	MANDOCERR_EQN_NOBOX, /* missing eqn box, using "": op */