1 files changed, 1 insertions, 0 deletions
diff --git a/lib.h b/lib.h
index 41465747..5c9b89ce 100644
--- a/lib.h
+++ b/lib.h
@@ -683,6 +683,7 @@ val sub(val seq, val from, val to);
 val ref(val seq, val ind);
 val refset(val seq, val ind, val newval);
 val replace(val seq, val items, val from, val to);
+val update(val seq, val fun);
 val env(void);
 val obj_print(val obj, val stream);
 val obj_pprint(val obj, val stream);