diff --git a/lib/stats_socket.rb b/lib/stats_socket.rb
index f4367c12c9d..ad39d12a479 100644
--- a/lib/stats_socket.rb
+++ b/lib/stats_socket.rb
@@ -42,7 +42,7 @@ class StatsSocket
     line = ""
 
     while Time.now - start < 10
-      if IO.select(nil, [socket], nil, 10)
+      if IO.select([socket], nil, nil, 10)
         begin
           line << socket.read_nonblock(1000)
         rescue IO::WaitReadable