diff --git a/lib/httpx/pool.rb b/lib/httpx/pool.rb
index 95fc23de..e615c02e 100644
--- a/lib/httpx/pool.rb
+++ b/lib/httpx/pool.rb
@@ -135,7 +135,6 @@ module HTTPX
       connection.on(:close) do
         unregister_connection(connection)
       end
-      return if connection.state == :open
     end
 
     def unregister_connection(connection)