diff --git a/crates/bevy_ecs/src/system/system.rs b/crates/bevy_ecs/src/system/system.rs
index d2b7bc07b2..85bb0cefd7 100644
--- a/crates/bevy_ecs/src/system/system.rs
+++ b/crates/bevy_ecs/src/system/system.rs
@@ -49,5 +49,5 @@ pub trait System: Send + Sync + 'static {
         unsafe { self.run_unsafe(input, world, resources) }
     }
     fn run_thread_local(&mut self, world: &mut World, resources: &mut Resources);
-    fn initialize(&mut self, _world: &mut World, _resources: &mut Resources) {}
+    fn initialize(&mut self, _world: &mut World, _resources: &mut Resources);
 }
diff --git a/crates/bevy_ecs/src/system/system_chaining.rs b/crates/bevy_ecs/src/system/system_chaining.rs
index e4d998796a..5d5397c80c 100644
--- a/crates/bevy_ecs/src/system/system_chaining.rs
+++ b/crates/bevy_ecs/src/system/system_chaining.rs
@@ -68,6 +68,11 @@ impl<SystemA: System, SystemB: System<Input = SystemA::Output>> System
         self.system_a.run_thread_local(world, resources);
         self.system_b.run_thread_local(world, resources);
     }
+
+    fn initialize(&mut self, world: &mut World, resources: &mut Resources) {
+        self.system_a.initialize(world, resources);
+        self.system_b.initialize(world, resources);
+    }
 }
 
 pub trait IntoChainSystem<AParams, BParams, IntoB, SystemA, SystemB>: