diff --git a/src/structs.h b/src/structs.h
index d959b5c..31f71d2 100644
--- a/src/structs.h
+++ b/src/structs.h
@@ -808,6 +808,10 @@
 {
     int		    bs_idx;	 /* index of pattern */
     int		    bs_flags;	 /* flags for pattern */
+#ifdef FEAT_CONCEAL
+    int		    bs_seqnr;	 /* stores si_seqnr */
+    int		    bs_cchar;	 /* stores si_cchar */
+#endif
     reg_extmatch_T *bs_extmatch; /* external matches from start pattern */
 } bufstate_T;