diff --git a/youtube_dl/utils.py b/youtube_dl/utils.py
index fdff1b628..7537bc6b7 100644
--- a/youtube_dl/utils.py
+++ b/youtube_dl/utils.py
@@ -3570,6 +3570,7 @@ class PerRequestProxyHandler(compat_urllib_request.ProxyHandler):
                     lambda r, proxy='__noproxy__', type=type, meth=self.proxy_open:
                         meth(r, proxy, type))
 
+    @property
     def proxy_handler(self, proxies=None):
         return compat_urllib_request.ProxyHandler.__init__(self, proxies)