1 files changed, 5 insertions, 0 deletions
diff --git a/Modules/_io/fileio.c b/Modules/_io/fileio.c
index 2361636..2e5d7ac 100644
--- a/Modules/_io/fileio.c
+++ b/Modules/_io/fileio.c
@@ -388,6 +388,11 @@ fileio_init(PyObject *oself, PyObject *args, PyObject *kwds)
             goto error;
     }
 
+#if defined(MS_WINDOWS) || defined(__CYGWIN__)
+    /* don't translate newlines (\r\n <=> \n) */
+    _setmode(self->fd, O_BINARY);
+#endif
+
     if (PyObject_SetAttrString((PyObject *)self, "name", nameobj) < 0)
         goto error;