diff --git a/plugins/provisioners/cfengine/config.rb b/plugins/provisioners/cfengine/config.rb
index fb6364494..7d00b1c8c 100644
--- a/plugins/provisioners/cfengine/config.rb
+++ b/plugins/provisioners/cfengine/config.rb
@@ -3,6 +3,7 @@ require "vagrant"
 module VagrantPlugins
   module CFEngine
     class Config < Vagrant.plugin("2", :config)
+      attr_accessor :classes
       attr_accessor :deb_repo_file
       attr_accessor :deb_repo_line
       attr_accessor :force_bootstrap
@@ -16,6 +17,7 @@ module VagrantPlugins
       attr_accessor :yum_repo_url
 
       def initialize
+        @classes          = UNSET_VALUE
         @deb_repo_file    = UNSET_VALUE
         @deb_repo_line    = UNSET_VALUE
         @force_bootstrap  = UNSET_VALUE
@@ -30,6 +32,8 @@ module VagrantPlugins
       end
 
       def finalize!
+        @classes = nil if @classes == UNSET_VALUE
+
         if @deb_repo_file == UNSET_VALUE
           @deb_repo_file = "/etc/apt/sources.list.d/cfengine-community.list"
         end
@@ -75,6 +79,10 @@ module VagrantPlugins
           errors << I18n.t("vagrant.cfengine_config.policy_server_address") if !@policy_server_address
         end
 
+        if @classes && !@classes.is_a?(Array)
+          errors << I18n.t("vagrant.cfengine_config.classes_array")
+        end
+
         { "CFEngine" => errors }
       end
     end
diff --git a/plugins/provisioners/cfengine/provisioner.rb b/plugins/provisioners/cfengine/provisioner.rb
index 74f2b8f6e..95ea19a3a 100644
--- a/plugins/provisioners/cfengine/provisioner.rb
+++ b/plugins/provisioners/cfengine/provisioner.rb
@@ -21,7 +21,7 @@ module VagrantPlugins
           @machine.ui.info(I18n.t("vagrant.cfengine_single_run_execute"))
           path = Pathname.new(@config.run_file).expand_path(@machine.env.root_path)
           machine.communicate.upload(path.to_s, @config.upload_path)
-          cfagent("-KI -f #{@config.upload_path}")
+          cfagent("-KI -f #{@config.upload_path}#{cfagent_classes_args}")
         end
       end
 
@@ -44,6 +44,15 @@ module VagrantPlugins
         end
       end
 
+      # Returns the arguments for the classes configuration if they are
+      # set.
+      def cfagent_classes_args
+        return "" if !@config.classes
+
+        args = @config.classes.map { |c| "-D#{c}" }.join(" ")
+        return " #{args}"
+      end
+
       # This handles checking if the CFEngine installation needs to
       # be bootstrapped, and bootstraps if it does.
       def handle_cfengine_bootstrap
diff --git a/templates/locales/en.yml b/templates/locales/en.yml
index 533cc36b2..bb03cb9dd 100644
--- a/templates/locales/en.yml
+++ b/templates/locales/en.yml
@@ -16,6 +16,8 @@ en:
       Executing run file for CFEngine...
 
     cfengine_config:
+      classes_array: |-
+        The 'classes' configuration must be an array.
       invalid_mode: |-
         The mode must be 'bootstrap' or 'single_run'
       policy_server_address: |-