diff --git a/chainsyncer/cli/config.py b/chainsyncer/cli/config.py
index d840512..c62ebf7 100644
--- a/chainsyncer/cli/config.py
+++ b/chainsyncer/cli/config.py
@@ -1,19 +1,15 @@
-# external imports
-from chainsyncer.cli import SyncFlag
-
-
-def process_config(config, args, flags):
+def process_config(config, arg, args, flags):
         args_override = {}
 
         args_override['SYNCER_BACKEND'] = getattr(args, 'backend')
 
-        if flags & SyncFlag.RANGE:
+        if arg.match('range', flags):
             args_override['SYNCER_OFFSET'] = getattr(args, 'offset')
             args_override['SYNCER_LIMIT'] = getattr(args, 'until')
 
         config.dict_override(args_override, 'local cli args')
 
-        if flags & SyncFlag.HEAD:
+        if arg.match('head', flags):
             config.add(getattr(args, 'keep_alive'), '_KEEP_ALIVE')
             config.add(getattr(args, 'head'), '_HEAD')