diff --git a/lib/active_resource.rb b/lib/active_resource.rb
index b8c77a56e5..ef3490e009 100644
--- a/lib/active_resource.rb
+++ b/lib/active_resource.rb
@@ -41,3 +41,6 @@ module ActiveResource
   autoload :Validations
   autoload :Collection
 end
+
+require 'active_resource/railtie' if defined? Rails
+
diff --git a/lib/active_resource/base.rb b/lib/active_resource/base.rb
index f9a66bd7f9..dcac3ae8f2 100644
--- a/lib/active_resource/base.rb
+++ b/lib/active_resource/base.rb
@@ -1560,4 +1560,7 @@ class Base
     include ActiveModel::Serializers::Xml
     include ActiveResource::Reflection
   end
+
+  ActiveSupport.run_load_hooks(:active_resource, Base)
 end
+
diff --git a/lib/active_resource/railtie.rb b/lib/active_resource/railtie.rb
index 60f6f88311..6b0a433e97 100644
--- a/lib/active_resource/railtie.rb
+++ b/lib/active_resource/railtie.rb
@@ -10,5 +10,16 @@ class Railtie < Rails::Railtie
         ActiveResource::Base.send "#{k}=", v
       end
     end
+
+    config.after_initialize do |app|
+      ActiveSupport.on_load(:active_resource) do
+        ActiveResource::Base.instantiate_observers
+
+        ActionDispatch::Reloader.to_prepare do
+          ActiveResource::Base.instantiate_observers
+        end
+      end
+    end
   end
-end
\ No newline at end of file
+end
+