diff --git a/freqtrade/configuration/arguments.py b/freqtrade/configuration/arguments.py
index 124bf3b75..d26d64c40 100644
--- a/freqtrade/configuration/arguments.py
+++ b/freqtrade/configuration/arguments.py
@@ -80,7 +80,7 @@ class Arguments:
 
         return parsed_arg
 
-    def _build_args(self, optionlist, parser=None):
+    def _build_args(self, optionlist, parser):
 
         for val in optionlist:
             opt = AVAILABLE_CLI_OPTIONS[val]