diff --git a/Lib/subprocess.py b/Lib/subprocess.py
index db19d1f..8d0204e 100644
--- a/Lib/subprocess.py
+++ b/Lib/subprocess.py
@@ -229,7 +229,7 @@
 output=`dmesg | grep hda`
 ==>
 p1 = Popen(["dmesg"], stdout=PIPE)
-p2 = Popen(["grep", "hda"], stdin=p1.stdout)
+p2 = Popen(["grep", "hda"], stdin=p1.stdout, stdout=PIPE)
 output = p2.communicate()[0]