diff --git a/requests/adapters.py b/requests/adapters.py
index b62f64c8..b26c6a54 100644
--- a/requests/adapters.py
+++ b/requests/adapters.py
@@ -202,7 +202,10 @@ class HTTPAdapter(BaseAdapter):
             if not proxy in self.proxy_manager:
                 self.proxy_manager[proxy] = proxy_from_url(
                                                 proxy,
-                                                proxy_headers=proxy_headers)
+                                                proxy_headers=proxy_headers,
+                                                num_pools=self._pool_connections,
+                                                maxsize=self._pool_maxsize,
+                                                block=self._pool_block)
 
             conn = self.proxy_manager[proxy].connection_from_url(url)
         else: