diff --git a/crates/bevy_ecs/src/system/system_param.rs b/crates/bevy_ecs/src/system/system_param.rs index fdcf36a018ba3..25c3100c90747 100644 --- a/crates/bevy_ecs/src/system/system_param.rs +++ b/crates/bevy_ecs/src/system/system_param.rs @@ -724,6 +724,8 @@ impl_param_set!(); )] pub trait Resource: Send + Sync + 'static {} +impl Resource for () {} + // SAFETY: Res only reads a single World resource unsafe impl<'a, T: Resource> ReadOnlySystemParam for Res<'a, T> {}