diff --git a/crates/bevy_ecs/src/world/component_constants.rs b/crates/bevy_ecs/src/world/component_constants.rs
index ad2da3e34f9b7..92c1572b0935b 100644
--- a/crates/bevy_ecs/src/world/component_constants.rs
+++ b/crates/bevy_ecs/src/world/component_constants.rs
@@ -29,6 +29,7 @@ pub struct OnInsert;
 /// Trigger emitted when a component is replaced on an entity. See [`crate::component::ComponentHooks::on_replace`]
 /// for more information.
 #[derive(Event)]
+#[cfg_attr(feature = "bevy_reflect", derive(Reflect))]
 pub struct OnReplace;
 
 /// Trigger emitted when a component is removed from an entity. See [`crate::component::ComponentHooks::on_remove`]