diff --git a/Rakefile b/Rakefile
index 07441859..094337a0 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,7 +1,7 @@
 require 'bundler/gem_tasks'
 
 RELISH_PROJECT = 'trema/pio'
-FLAY_THRESHOLD = 1450
+FLAY_THRESHOLD = 1470
 
 task default: :travis
 task test: [:spec, :cucumber]
diff --git a/features/open_flow13/copy_ttl_inwards.feature b/features/open_flow13/copy_ttl_inwards.feature
new file mode 100644
index 00000000..8ca08848
--- /dev/null
+++ b/features/open_flow13/copy_ttl_inwards.feature
@@ -0,0 +1,14 @@
+@open_flow13
+Feature: Pio::CopyTtlInwards
+
+  Copies TTL "inwards" -- from outermost to next-to-outermost
+
+  Scenario: new
+    When I try to create an OpenFlow action with:
+      """
+      Pio::CopyTtlInwards.new
+      """
+    Then it should finish successfully
+    And the action has the following fields and values:
+      | field       | value |
+      | action_type |    12 |
diff --git a/lib/pio/open_flow.rb b/lib/pio/open_flow.rb
index b5cbdbde..a9e70ae6 100644
--- a/lib/pio/open_flow.rb
+++ b/lib/pio/open_flow.rb
@@ -24,7 +24,7 @@ def self.switch_version(version)
        :SetArpSenderHardwareAddress, :NiciraRegMove, :SetMetadata,
        :NiciraRegLoad, :NiciraSendOutPort, :NiciraStackPush,
        :NiciraStackPop, :DecrementIpTtl, :SetIpTtl,
-       :CopyTtlOutwards].each do |each|
+       :CopyTtlOutwards, :CopyTtlInwards].each do |each|
         set_message_class_name each, version
         @version = version.to_s
       end
diff --git a/lib/pio/open_flow13.rb b/lib/pio/open_flow13.rb
index 96387195..5294c99f 100644
--- a/lib/pio/open_flow13.rb
+++ b/lib/pio/open_flow13.rb
@@ -15,6 +15,7 @@
 # Actions
 require 'pio/open_flow/nicira_resubmit'
 require 'pio/open_flow/nicira_resubmit_table'
+require 'pio/open_flow13/copy_ttl_inwards'
 require 'pio/open_flow13/copy_ttl_outwards'
 require 'pio/open_flow13/decrement_ip_ttl'
 require 'pio/open_flow13/nicira_reg_load'
diff --git a/lib/pio/open_flow13/copy_ttl_inwards.rb b/lib/pio/open_flow13/copy_ttl_inwards.rb
new file mode 100644
index 00000000..82b57129
--- /dev/null
+++ b/lib/pio/open_flow13/copy_ttl_inwards.rb
@@ -0,0 +1,15 @@
+require 'pio/open_flow/action'
+
+module Pio
+  module OpenFlow13
+    # Copies TTL "inwards" -- from outermost to next-to-outermost
+    class CopyTtlInwards < OpenFlow::Action
+      action_header action_type: 12, action_length: 8
+      string :padding, length: 4
+
+      def initialize
+        super({})
+      end
+    end
+  end
+end