diff --git a/k4FWCore/scripts/k4run b/k4FWCore/scripts/k4run
index d8bd2fd0..36ed60ee 100755
--- a/k4FWCore/scripts/k4run
+++ b/k4FWCore/scripts/k4run
@@ -131,7 +131,7 @@ def main():
     formatter = logging.Formatter("[k4run] %(message)s")
     handler = logging.StreamHandler(sys.stdout)
     handler.setFormatter(formatter)
-    logger.addHandler(handler)
+    logger.handlers = [handler]
 
     from k4FWCore.parseArgs import parser