diff --git a/lib/validates_timeliness.rb b/lib/validates_timeliness.rb
index cdea2fc..471db46 100644
--- a/lib/validates_timeliness.rb
+++ b/lib/validates_timeliness.rb
@@ -21,6 +21,11 @@ module ValidatesTimeliness
 
   class << self
 
+    def enable_datetime_select_extension!
+      enable_datetime_select_invalid_value_extension!
+      enable_multiparameter_attributes_extension!
+    end
+
     def load_error_messages
       if defined?(I18n)
         I18n.load_path += [ LOCALE_PATH ]
diff --git a/lib/validates_timeliness/action_view/instance_tag.rb b/lib/validates_timeliness/action_view/instance_tag.rb
index 4d7965d..98529f8 100644
--- a/lib/validates_timeliness/action_view/instance_tag.rb
+++ b/lib/validates_timeliness/action_view/instance_tag.rb
@@ -1,6 +1,6 @@
 module ValidatesTimeliness
 
-  def self.enable_datetime_select_extension!
+  def self.enable_datetime_select_invalid_value_extension!
     ::ActionView::Helpers::InstanceTag.send(:include, ValidatesTimeliness::ActionView::InstanceTag)
   end
 
diff --git a/lib/validates_timeliness/active_record/multiparameter_attributes.rb b/lib/validates_timeliness/active_record/multiparameter_attributes.rb
index c8b3be3..68de263 100644
--- a/lib/validates_timeliness/active_record/multiparameter_attributes.rb
+++ b/lib/validates_timeliness/active_record/multiparameter_attributes.rb
@@ -1,6 +1,10 @@
 module ValidatesTimeliness
-  module ActiveRecord
 
+  def self.enable_multiparameter_attributes_extension!
+    ::ActiveRecord::Base.send(:include, ValidatesTimeliness::ActiveRecord::MultiparameterAttributes)
+  end
+
+  module ActiveRecord
     module MultiparameterAttributes
       
       def self.included(base)
@@ -38,13 +42,13 @@ module ValidatesTimeliness
         values = values.map(&:to_s)
                 
         case type
-          when :date
-            extract_date_from_multiparameter_attributes(values)
-          when :time
-            extract_time_from_multiparameter_attributes(values)
-          when :datetime
-            date_values, time_values = values.slice!(0, 3), values
-            extract_date_from_multiparameter_attributes(date_values) + " " + extract_time_from_multiparameter_attributes(time_values)
+        when :date
+          extract_date_from_multiparameter_attributes(values)
+        when :time
+          extract_time_from_multiparameter_attributes(values)
+        when :datetime
+          date_values, time_values = values.slice!(0, 3), values
+          extract_date_from_multiparameter_attributes(date_values) + " " + extract_time_from_multiparameter_attributes(time_values)
         end
       end   
          
@@ -60,5 +64,3 @@ module ValidatesTimeliness
 
   end
 end
-
-ActiveRecord::Base.send(:include, ValidatesTimeliness::ActiveRecord::MultiparameterAttributes)