diff --git a/pickle/pickle.py b/pickle/pickle.py
index e455620b..751a05dd 100644
--- a/pickle/pickle.py
+++ b/pickle/pickle.py
@@ -1,7 +1,9 @@
-def dump(obj, f):
+HIGHEST_PROTOCOL = 0
+
+def dump(obj, f, proto=0):
     f.write(repr(obj))
 
-def dumps(obj):
+def dumps(obj, proto=0):
     return repr(obj)
 
 def load(f):