diff --git a/lib/pry/default_commands/input.rb b/lib/pry/default_commands/input.rb
index 71711383c..8a396a5fb 100644
--- a/lib/pry/default_commands/input.rb
+++ b/lib/pry/default_commands/input.rb
@@ -79,7 +79,7 @@ module DefaultCommands
           range = opts.l? ? one_index_range_or_number(opts[:l]) : (0..-1)
           range = (0..-2) if opts.o?
 
-          eval_string.replace((code.each_line.to_a[range]).join)
+          eval_string.replace(Array(code.each_line.to_a[range]).join)
           run "show-input" if opts.o?
         elsif opts.f?
           file_name = File.expand_path(opts[:f])