diff --git a/storages/backends/s3boto.py b/storages/backends/s3boto.py
index fd97f6d63..f2c86c5ce 100644
--- a/storages/backends/s3boto.py
+++ b/storages/backends/s3boto.py
@@ -182,6 +182,9 @@ def close(self):
             if not self._multipart is None:
                 self._multipart.cancel_upload()
         self.key.close()
+        if self._file is not None:
+            self._file.close()
+            self._file = None
 
 
 @deconstructible