diff --git a/pyrelacs/dataio/sin_producer.py b/pyrelacs/dataio/sin_producer.py
index aaf1354..7c7941d 100644
--- a/pyrelacs/dataio/sin_producer.py
+++ b/pyrelacs/dataio/sin_producer.py
@@ -8,7 +8,6 @@ from pyrelacs.util.logging import config_logging
 log = config_logging()
 
 
-# stopbutton: QAction
 class SinProducer:
     def __init__(
         self,