1 files changed, 4 insertions, 1 deletions
diff --git a/ecs/src/system/observer.rs b/ecs/src/system/observer.rs
index 5455fd4..1496d40 100644
--- a/ecs/src/system/observer.rs
+++ b/ecs/src/system/observer.rs
@@ -37,7 +37,10 @@ where
 
     fn events() -> Self::Events
     {
-        [Pair::new::<Relation>(Target::id())]
+        [Pair::builder()
+            .relation::<Relation>()
+            .target::<Target>()
+            .build()]
     }
 }