diff --git a/crates/bevy_ecs/src/system/commands/mod.rs b/crates/bevy_ecs/src/system/commands/mod.rs
index 028182e69f..0db820a374 100644
--- a/crates/bevy_ecs/src/system/commands/mod.rs
+++ b/crates/bevy_ecs/src/system/commands/mod.rs
@@ -827,6 +827,7 @@ pub trait EntityCommand<Marker = ()>: Send + 'static {
     /// Executes this command for the given [`Entity`].
     fn apply(self, id: Entity, world: &mut World);
     /// Returns a [`Command`] which executes this [`EntityCommand`] for the given [`Entity`].
+    #[must_use = "commands do nothing unless applied to a `World`"]
     fn with_entity(self, id: Entity) -> WithEntity<Marker, Self>
     where
         Self: Sized,