1 files changed, 1 insertions, 0 deletions
diff --git a/struct.h b/struct.h
index 4b442fb7..213a4b91 100644
--- a/struct.h
+++ b/struct.h
@@ -39,6 +39,7 @@ enum special_slot {
   equal_m, nullify_m, from_list_m, lambda_m, lambda_set_m,
   length_m, car_m, cdr_m, rplaca_m, rplacd_m,
   iter_begin_m, iter_more_m, iter_item_m, iter_step_m, iter_reset_m,
+  plus_m,
   num_special_slots
 };