diff --git a/ldapcherry/__init__.py b/ldapcherry/__init__.py
index 72fbc2e..6c1b277 100644
--- a/ldapcherry/__init__.py
+++ b/ldapcherry/__init__.py
@@ -330,6 +330,7 @@
         cherrypy.log.error_log.setLevel(level)
 
         if debug:
+            cherrypy.log.error_log.handlers = []
             handler = logging.StreamHandler(sys.stderr)
             handler.setLevel(logging.DEBUG)
             cherrypy.log.error_log.addHandler(handler)