diff --git a/lib/slugtastic.rb b/lib/slugtastic.rb
index 82f2053..88928d7 100644
--- a/lib/slugtastic.rb
+++ b/lib/slugtastic.rb
@@ -1,5 +1,6 @@
 require "slugtastic/version"
 require "slugtastic/model_additions"
+require "slugtastic/railtie" if defined? Rails
 
 module Slugtastic
   def self.generate_slug(string)
diff --git a/lib/slugtastic/railtie.rb b/lib/slugtastic/railtie.rb
new file mode 100644
index 0000000..f597cc0
--- /dev/null
+++ b/lib/slugtastic/railtie.rb
@@ -0,0 +1,9 @@
+module Slugtastic
+  class Railtie < Rails::Railtie
+    initializer "slugtastic.model_additions" do
+      ActiveSupport.on_load :active_record do
+        extend ModelAdditions
+      end
+    end
+  end
+end