diff --git a/Lib/subprocess.py b/Lib/subprocess.py
index dc639c9..6065594 100644
--- a/Lib/subprocess.py
+++ b/Lib/subprocess.py
@@ -661,8 +661,10 @@
                 self.stdin.close()
             elif self.stdout:
                 stdout = self.stdout.read()
+                self.stdout.close()
             elif self.stderr:
                 stderr = self.stderr.read()
+                self.stderr.close()
             self.wait()
             return (stdout, stderr)