diff -r b88525a8c01d Lib/codecs.py
--- a/Lib/codecs.py	Thu Jul 03 06:25:10 2014 +0300
+++ b/Lib/codecs.py	Thu Jul 03 14:47:11 2014 +0100
@@ -385,7 +385,8 @@
             stream to recover state.
 
         """
-        pass
+        if hasattr(self.stream, "flush"):
+            self.stream.flush()
 
     def seek(self, offset, whence=0):
         self.stream.seek(offset, whence)