diff --git a/src/lazysegtree.rs b/src/lazysegtree.rs
index 53e9487..793d03c 100644
--- a/src/lazysegtree.rs
+++ b/src/lazysegtree.rs
@@ -291,6 +291,7 @@ impl<F: MapMonoid> LazySegtree<F> {
     }
 }
 
+#[derive(Clone)]
 pub struct LazySegtree<F>
 where
     F: MapMonoid,