diff --git a/ac_encode.py b/ac_encode.py
index 57d013f..1700b04 100644
--- a/ac_encode.py
+++ b/ac_encode.py
@@ -240,10 +240,10 @@ def test():
         N = len(s)  # required for decoding later.
         print("original:", s)
 
-        e = encode(s, 10, 1)
+        e = encode(s, c0=10, c1=1)
         print("encoded: ", e)
 
-        ds = decode(e, N, 10, 1)
+        ds = decode(e, N, c0=10, c1=1)
         print("decoded: ", ds)
 
         if ds != s: