diff --git a/Lib/http/server.py b/Lib/http/server.py
index 226ca3b16ccbeb..d2daeab6fd3deb 100644
--- a/Lib/http/server.py
+++ b/Lib/http/server.py
@@ -1291,7 +1291,7 @@ def run_cgi(self):
                 cursize = 0
                 data = self.rfile.read(min(nbytes, _MIN_READ_BUF_SIZE))
                 while (len(data) < nbytes and len(data) != cursize and
-                       select.select([self.rfile._sock], [], [], 0)[0]):
+                       select.select([self.rfile._sock], [], [], None)[0]):
                     cursize = len(data)
                     # This is a geometric increase in read size (never more
                     # than doubling our the current length of data per loop