diff --git a/pip/download.py b/pip/download.py
index b11d1e8c4e7..2cebc69b6c0 100644
--- a/pip/download.py
+++ b/pip/download.py
@@ -132,7 +132,7 @@ def setup(self, proxystr='', prompting=True):
         self.prompting = prompting
         proxy = self.get_proxy(proxystr)
         if proxy:
-            proxy_support = urllib2.ProxyHandler({"http": proxy, "ftp": proxy})
+            proxy_support = urllib2.ProxyHandler({"http": proxy, "ftp": proxy, "https": proxy})
             opener = urllib2.build_opener(proxy_support, urllib2.CacheFTPHandler)
             urllib2.install_opener(opener)