diff --git a/lib/vagrant/config/vm/provisioner.rb b/lib/vagrant/config/vm/provisioner.rb
index eb996208b..d064c4637 100644
--- a/lib/vagrant/config/vm/provisioner.rb
+++ b/lib/vagrant/config/vm/provisioner.rb
@@ -1,3 +1,5 @@
+require 'log4r'
+
 module Vagrant
   module Config
     class VMConfig < Base
@@ -8,11 +10,14 @@ module Vagrant
         attr_reader :config
 
         def initialize(shortcut, options=nil, &block)
+          @logger = Log4r::Logger.new("vagrant::config::vm::provisioner")
+          @logger.debug("Provisioner config: #{shortcut}")
           @shortcut = shortcut
           @provisioner = shortcut
           @provisioner = Vagrant.provisioners.get(shortcut) if shortcut.is_a?(Symbol)
           @config = nil
 
+          @logger.info("Provisioner class: #{provisioner}")
           configure(options, &block) if @provisioner
         end
 
@@ -21,6 +26,7 @@ module Vagrant
           config_class = @provisioner.config_class
           return if !config_class
 
+          @logger.debug("Configuring provisioner with: #{config_class}")
           @config = config_class.new
           @config.set_options(options) if options
           block.call(@config) if block
diff --git a/lib/vagrant/provisioners/chef_client.rb b/lib/vagrant/provisioners/chef_client.rb
index 7ced20e33..9c0620a02 100644
--- a/lib/vagrant/provisioners/chef_client.rb
+++ b/lib/vagrant/provisioners/chef_client.rb
@@ -29,7 +29,7 @@ module Vagrant
           @encrypted_data_bag_secret = "/tmp/encrypted_data_bag_secret"
         end
 
-        def validate(errors)
+        def validate(env, errors)
           super
 
           errors.add(I18n.t("vagrant.config.chef.server_url_empty")) if !chef_server_url || chef_server_url.strip == ""
diff --git a/lib/vagrant/provisioners/chef_solo.rb b/lib/vagrant/provisioners/chef_solo.rb
index 295aec97b..931a59d4d 100644
--- a/lib/vagrant/provisioners/chef_solo.rb
+++ b/lib/vagrant/provisioners/chef_solo.rb
@@ -23,7 +23,7 @@ module Vagrant
           @nfs = false
         end
 
-        def validate(errors)
+        def validate(env, errors)
           super
 
           errors.add(I18n.t("vagrant.config.chef.cookbooks_path_empty")) if !cookbooks_path || [cookbooks_path].flatten.empty?