diff --git a/lib/pry/repl.rb b/lib/pry/repl.rb
index 4748785a..287dcf4f 100644
--- a/lib/pry/repl.rb
+++ b/lib/pry/repl.rb
@@ -180,6 +180,9 @@ class Pry
         end
 
         if defined?(Readline) and input == Readline
+          if !$stdout.tty? && $stdin.tty? && !Pry::Helpers::BaseHelpers.windows?
+            Readline.output = File.open('/dev/tty', 'w')
+          end
           input_readline(current_prompt, false) # false since we'll add it manually
         elsif defined? Coolline and input.is_a? Coolline
           input_readline(current_prompt)