diff --git a/tone-generator.ino b/tone-generator.ino
index ffdbea4..1423143 100644
--- a/tone-generator.ino
+++ b/tone-generator.ino
@@ -34,7 +34,9 @@ void loop() {
       indicator::update();
     }
   } else {
-    data::check();
+    if(data::check()) {
+      scheduler::do_next();
+    }
   }
 
   timing::update();