diff --git a/amodem/send.py b/amodem/send.py
index 975b6eb..cdb9eed 100644
--- a/amodem/send.py
+++ b/amodem/send.py
@@ -64,7 +64,7 @@ def main(config, src, dst, pylab=None):
     training_duration = sender.offset
     log.info('Sending %.3f seconds of training audio', training_duration / Fs)
 
-    reader = stream.Reader(src, bufsize=(64 << 10), eof=True)
+    reader = stream.Reader(src, eof=True)
     data = itertools.chain.from_iterable(reader)
     bits = framing.encode(data)
     log.info('Starting modulation')
diff --git a/amodem/stream.py b/amodem/stream.py
index ebea89b..ecadd0f 100644
--- a/amodem/stream.py
+++ b/amodem/stream.py
@@ -3,14 +3,14 @@ import time
 
 class Reader(object):
 
-    def __init__(self, fd, data_type=None, bufsize=4096,
-                 eof=False, timeout=2.0, wait=0.2):
+    wait = 0.2
+    timeout = 2.0
+    bufsize = 4096
+
+    def __init__(self, fd, data_type=None, eof=False):
         self.fd = fd
         self.data_type = data_type if (data_type is not None) else lambda x: x
-        self.bufsize = bufsize
         self.eof = eof
-        self.timeout = timeout
-        self.wait = wait
         self.total = 0
 
     def __iter__(self):