diff --git a/Lib/xml/sax/expatreader.py b/Lib/xml/sax/expatreader.py
index c9fc894..a227cda 100644
--- a/Lib/xml/sax/expatreader.py
+++ b/Lib/xml/sax/expatreader.py
@@ -219,6 +219,9 @@
         self._parsing = 0
         # break cycle created by expat handlers pointing to our methods
         self._parser = None
+        bs = self._source.getByteStream()
+        if bs is not None:
+            bs.close()
 
     def _reset_cont_handler(self):
         self._parser.ProcessingInstructionHandler = \