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> {}