diff --git a/frappyman.py b/frappyman.py
index a580159..f929c33 100644
--- a/frappyman.py
+++ b/frappyman.py
@@ -409,7 +409,7 @@ class FrappyManager(ServiceManager):
         return super().treat_args(argdict, unknown, extra)
 
     def check_cfg_file(self, ins, service, cfg, needsea=False):
-        if cfg is 'none':
+        if cfg == 'none':
             return ''
         try:
             desc, sea_cfg = self.cfg_details(self, ins, service, cfg)