diff --git a/xfaster/xfaster_class.py b/xfaster/xfaster_class.py
index b38a9a46..747d0ff8 100644
--- a/xfaster/xfaster_class.py
+++ b/xfaster/xfaster_class.py
@@ -439,9 +439,9 @@ def root_notice(msg, *args, **kwargs):
         # configure logger
         self.logger = logging.getLogger("xfaster")
         # replace any existing handlers before adding one
-        if logger.hasHandlers():
-            for h in list(logger.handlers):
-                logger.removeHandler(h)
+        if self.logger.hasHandlers():
+            for h in list(self.logger.handlers):
+                self.logger.removeHandler(h)
         self.logger.addHandler(handler)
 
         # set logging level