diff --git a/lib/vagrant-backports/action/is_state.rb b/lib/vagrant-backports/action/is_state.rb
index baca5c2..8d956f5 100644
--- a/lib/vagrant-backports/action/is_state.rb
+++ b/lib/vagrant-backports/action/is_state.rb
@@ -1,2 +1,34 @@
-# TODO: Implement this for vagrant < 1.5
-raise 'Action::IsState has not been backported yet!'
+module Vagrant
+  module Backports
+    module Action
+      # This middleware is meant to be used with Call and can check if
+      # a machine is in the given state ID.
+      class IsState
+        # Note: Any of the arguments can be arrays as well.
+        #
+        # @param [Symbol] target_state The target state ID that means that
+        #   the machine was properly shut down.
+        # @param [Symbol] source_state The source state ID that the machine
+        #   must be in to be shut down.
+        def initialize(app, env, check, **opts)
+          @app    = app
+          @logger = Log4r::Logger.new("vagrant::action::builtin::is_state")
+          @check  = check
+          @invert = !!opts[:invert]
+        end
+
+        def call(env)
+          @logger.debug("Checking if machine state is '#{@check}'")
+          state = env[:machine].state.id
+          @logger.debug("-- Machine state: #{state}")
+
+          env[:result] = @check == state
+          env[:result] = !env[:result] if @invert
+          @app.call(env)
+        end
+      end
+    end
+  end
+end
+
+Vagrant::Action::Builtin.const_set :IsState, Vagrant::Backports::Action::IsState
diff --git a/lib/vagrant-lxc/action.rb b/lib/vagrant-lxc/action.rb
index 5286718..81e0b25 100644
--- a/lib/vagrant-lxc/action.rb
+++ b/lib/vagrant-lxc/action.rb
@@ -26,6 +26,7 @@ unless Vagrant::Backports.vagrant_1_5_or_later?
   require 'vagrant-backports/ui'
   require 'vagrant-backports/action/handle_box'
   require 'vagrant-backports/action/message'
+  require 'vagrant-backports/action/is_state'
 end
 
 module Vagrant