diff --git a/app-proto/src/assembly.rs b/app-proto/src/assembly.rs
index 50b0783..d30a371 100644
--- a/app-proto/src/assembly.rs
+++ b/app-proto/src/assembly.rs
@@ -31,8 +31,8 @@ pub struct Element {
     pub color: ElementColor,
     pub representation: Signal<DVector<f64>>,
     
-    // the regulators that affect this element. the ambient assembly is
-    // responsible for keeping this set up to date
+    // All regulators with this element as a subject. The assembly owning
+    // this element is responsible for keeping this set up to date.
     pub regulators: Signal<BTreeSet<RegulatorKey>>,
     
     // a serial number, assigned by `Element::new`, that uniquely identifies