diff --git a/crates/bevy_ecs/src/system/observer_system.rs b/crates/bevy_ecs/src/system/observer_system.rs
index 7cae84d160..55173ccf4f 100644
--- a/crates/bevy_ecs/src/system/observer_system.rs
+++ b/crates/bevy_ecs/src/system/observer_system.rs
@@ -5,9 +5,7 @@ use crate::{
 
 use super::IntoSystem;
 
-/// Implemented for systems that have an [`Observer`] as the first argument.
-///
-/// [`Observer`]: crate::observer::Observer
+/// Implemented for [`System`]s that have a [`Trigger`] as the first argument.
 pub trait ObserverSystem<E: 'static, B: Bundle, Out = ()>:
     System<In = Trigger<'static, E, B>, Out = Out> + Send + 'static
 {