diff -r 4a3b455abf76 Objects/fileobject.c
--- a/Objects/fileobject.c	Wed Apr 09 15:40:18 2014 -0400
+++ b/Objects/fileobject.c	Wed Apr 16 02:18:39 2014 -0400
@@ -1051,7 +1051,7 @@ new_buffersize(PyFileObject *f, size_t c
 static PyObject *
 file_read(PyFileObject *f, PyObject *args)
 {
-    long bytesrequested = -1;
+    Py_ssize_t bytesrequested = -1;
     size_t bytesread, buffersize, chunksize;
     PyObject *v;
 
@@ -1064,7 +1064,7 @@ file_read(PyFileObject *f, PyObject *arg
         (f->f_bufend - f->f_bufptr) > 0 &&
         f->f_buf[0] != '\0')
         return err_iterbuffered();
-    if (!PyArg_ParseTuple(args, "|l:read", &bytesrequested))
+    if (!PyArg_ParseTuple(args, "|n:read", &bytesrequested))
         return NULL;
     if (bytesrequested < 0)
         buffersize = new_buffersize(f, (size_t)0);