diff --git a/Lib/subprocess.py b/Lib/subprocess.py
index ca9489e..29c25bc 100644
--- a/Lib/subprocess.py
+++ b/Lib/subprocess.py
@@ -965,13 +965,8 @@
 
 
         def _close_fds(self, but):
-            for i in xrange(3, MAXFD):
-                if i == but:
-                    continue
-                try:
-                    os.close(i)
-                except:
-                    pass
+            os.closerange(3, but)
+            os.closerange(but + 1, MAXFD)
 
 
         def _execute_child(self, args, executable, preexec_fn, close_fds,