diff --git a/cranslib/clogger.py b/cranslib/clogger.py
index 19648860..1f5d071e 100644
--- a/cranslib/clogger.py
+++ b/cranslib/clogger.py
@@ -14,15 +14,20 @@ TZ = pytz.timezone('Europe/Paris')
 
 class CLogger(logging.Logger):
     """
-    Crans logger
+    Crans logger.
     """
 
-    def __init__(self, loggerName, service, level, debug=False):
+    def __init__(self, loggerName, service=None, level="info", debug=False):
         """
         Initializes logger. The debug variable is useful to have a print to stdout (when debugging)
         """
         super(CLogger, self).__init__(loggerName)
 
+        if service is None:
+            fmt = "%(asctime)s - %(name)s - %(levelname)s - %(message)s"
+        else:
+            fmt = "%%(asctime)s - %%(name)s - %(service)s - %%(levelname)s - %%(message)s" % {'service': service}
+
         # Creates FileHandler
         self.fh = logging.FileHandler("/var/log/clogger/%s.log" % (loggerName,))
 
@@ -31,7 +36,7 @@ class CLogger(logging.Logger):
         self.fh.setLevel(self.fhlevel)
 
         # Creates formatter
-        self.formatter = CFormatter('%%(asctime)s - %%(name)s - %(service)s - %%(levelname)s - %%(message)s' % {'service': service}, "%Y-%m-%dT%H:%M:%S.%f%z")
+        self.formatter = CFormatter(fmt, "%Y-%m-%dT%H:%M:%S.%f%z")
 
         # Adds formatter to FileHandler
         self.fh.setFormatter(self.formatter)