diff --git a/lib/pry/core_extensions.rb b/lib/pry/core_extensions.rb
index 88acd17f..608e100d 100644
--- a/lib/pry/core_extensions.rb
+++ b/lib/pry/core_extensions.rb
@@ -119,15 +119,3 @@ if [[1, 2]].pretty_inspect == "[1]\n"
     end
   end
 end
-
-if defined?(JRUBY_VERSION) && JRUBY_VERSION == "1.7.0"
-  require 'io/console'
-  class IO
-    def winsize
-      stty_info = `stty -a`
-      match = stty_info.match(/(\d+) rows; (\d+) columns/) # BSD version of stty, like the one used in Mac OS X
-      match ||= stty_info.match(/; rows (\d+); columns (\d+)/) # GNU version of stty, like the one used in Ubuntu
-      [match[1].to_i, match[2].to_i]
-    end
-  end
-end
diff --git a/lib/pry/indent.rb b/lib/pry/indent.rb
index 1e9a08fb..5d74a453 100644
--- a/lib/pry/indent.rb
+++ b/lib/pry/indent.rb
@@ -410,20 +410,21 @@ class Pry
     # If the window size cannot be determined, return nil.
     def screen_size
       [
-         # io/console adds a winsize method to IO streams.
-         $stdout.tty? && $stdout.respond_to?(:winsize) && $stdout.winsize,
-
          # Some readlines also provides get_screen_size.
+         # Readline comes before IO#winsize because jruby sometimes defaults winsize to [25, 80]
          Readline.respond_to?(:get_screen_size) && Readline.get_screen_size,
 
+         # io/console adds a winsize method to IO streams.
+         # rescue nil for jruby 1.7.0 [jruby/jruby#354]
+         $stdout.tty? && $stdout.respond_to?(:winsize) && ($stdout.winsize rescue nil),
+
          # Otherwise try to use the environment (this may be out of date due
          # to window resizing, but it's better than nothing).
-         [ENV["ROWS"], ENV["COLUMNS"],
+         [ENV["ROWS"], ENV["COLUMNS"]],
 
          # If the user is running within ansicon, then use the screen size
          # that it reports (same caveats apply as with ROWS and COLUMNS)
          ENV['ANSICON'] =~ /\((.*)x(.*)\)/ && [$2, $1]
-        ]
       ].detect do |(_, cols)|
         cols.to_i > 0
       end