diff --git a/lib/sidekiq/cli.rb b/lib/sidekiq/cli.rb
index 74f578d0..f85a778d 100644
--- a/lib/sidekiq/cli.rb
+++ b/lib/sidekiq/cli.rb
@@ -116,7 +116,7 @@ module Sidekiq
         launcher.run
 
         while (readable_io = self_read.wait_readable)
-          signal = readable_io.first[0].gets.strip
+          signal = readable_io.gets.strip
           handle_signal(signal)
         end
       rescue Interrupt