diff --git a/lib/net/protocol.rb b/lib/net/protocol.rb
index 7e42d22..a62a269 100644
--- a/lib/net/protocol.rb
+++ b/lib/net/protocol.rb
@@ -21,7 +21,7 @@
 
 require 'socket'
 require 'timeout'
-require 'io/wait'
+require 'io/wait' if RUBY_VERSION < '3.2'
 
 module Net # :nodoc: