win32: fixes
diff --git a/serial/tools/miniterm.py b/serial/tools/miniterm.py
index 6ed4df0..7864b0e 100644
--- a/serial/tools/miniterm.py
+++ b/serial/tools/miniterm.py
@@ -123,8 +123,8 @@
                     return z
 
         def write(self, s):
-            sys.output.write(s)
-            sys.output.flush()
+            self.output.write(s)
+            self.output.flush()
 
 elif os.name == 'posix':
     import atexit