diff --git a/voussoirkit/bytestring.py b/voussoirkit/bytestring.py
index c385f8e..61e974a 100644
--- a/voussoirkit/bytestring.py
+++ b/voussoirkit/bytestring.py
@@ -124,8 +124,8 @@ def parsebytes(string):
 
     return int(number * multiplier)
 
-def main(args=None):
-    for line in pipeable.go(args, strip=True, skip_blank=True):
+def main(argv):
+    for line in pipeable.go(argv, strip=True, skip_blank=True):
         n = int(line)
         pipeable.output(bytestring(n))