diff --git a/uscope/src/main.rs b/uscope/src/main.rs
index 5154f04..230ff7d 100644
--- a/uscope/src/main.rs
+++ b/uscope/src/main.rs
@@ -372,6 +372,9 @@ fn rule_editor(
 				ui.painter_at(bounds).rect_filled(rect_a, 0., color);
 				ui.painter_at(bounds).rect_filled(rect_b, 0., color);
 
+				if result.clicked() {
+					changed = true;
+				}
 				result.clicked()
 			};
 			if resize_box(