diff --git a/ext/socket/lib/socket.rb b/ext/socket/lib/socket.rb
index 6196638bd2..6e1e78b809 100644
--- a/ext/socket/lib/socket.rb
+++ b/ext/socket/lib/socket.rb
@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 require 'socket.so'
-require 'io/wait'
+require 'io/wait' unless ::IO.public_instance_methods(false).include? :wait_readable
 
 class Addrinfo
   # creates an Addrinfo object from the arguments.