diff --git a/trees/segtree_generic.cc b/trees/segtree_generic.cc
index da82d72..69d15cd 100644
--- a/trees/segtree_generic.cc
+++ b/trees/segtree_generic.cc
@@ -1,4 +1,3 @@
-
 template<typename Addable_Info_t, typename Tag_t, typename Sequence = std::vector<Addable_Info_t>> class segtree {
 private:
     using size_type = uint64_t;
@@ -27,7 +26,7 @@ private:
         if (s != t) push(p, m - s + 1, t - m);
         if (x <= m) set(s, m, p * 2, x, c);
         else set(m + 1, t, p * 2 + 1, x, c);
-        d[p] = d[p * 2] + d[p * 2 + 1];
+        pull(p);
     }
     
     void range_apply(size_type s, size_type t, size_type p, size_type l, size_type r, const tag_type& c) {
@@ -123,4 +122,3 @@ struct Info {
 Info operator+(const Info &a, const Info &b) {
     return {a.val + b.val};
 }
-