diff --git a/include/ordinary.h b/include/ordinary.h
index 1d90b23..e04821f 100644
--- a/include/ordinary.h
+++ b/include/ordinary.h
@@ -27,6 +27,7 @@ void ordinary_list_rem(struct ordinary_list *list, struct ordinary_node *node);
 struct ordinary_node *ordinary_list_pop(struct ordinary_list *list);
 
 struct ordinary_node *ordinary_list_at(struct ordinary_list *list, uint32_t idx);
+uint8_t ordinary_list_full(struct ordinary_list *list);
 struct ordinary_node *ordinary_list_find(struct ordinary_list *list, callback cb);
 uint8_t ordinary_list_for(struct ordinary_list *list, callback cb);