diff --git a/lib/active_attr/model.rb b/lib/active_attr/model.rb
index 0322be6..baf59c5 100644
--- a/lib/active_attr/model.rb
+++ b/lib/active_attr/model.rb
@@ -4,6 +4,7 @@
 require "active_attr/logger"
 require "active_attr/mass_assignment_security"
 require "active_attr/query_attributes"
+require "active_attr/typecasted_attributes"
 require "active_model"
 require "active_support/concern"
 
@@ -27,6 +28,7 @@ module Model
     include MassAssignmentSecurity
     include AttributeDefaults
     include QueryAttributes
+    include TypecastedAttributes
 
     if defined? ActiveModel::Serializable
       include ActiveModel::Serializable::JSON
diff --git a/spec/functional/active_attr/model_spec.rb b/spec/functional/active_attr/model_spec.rb
index c980029..ed26252 100644
--- a/spec/functional/active_attr/model_spec.rb
+++ b/spec/functional/active_attr/model_spec.rb
@@ -11,6 +11,7 @@ module ActiveAttr
 
         attribute :first_name
         attribute :last_name
+        attribute :age, :type => Integer
 
         attr_protected :last_name
 
@@ -84,6 +85,11 @@ def self.name
       model_class.human_attribute_name(:first_name).should == "First name"
     end
 
+    it "typecasts attributes" do
+      subject.age = "29"
+      subject.age.should eql 29
+    end
+
     context "attribute defaults" do
       let :model_class do
         Class.new do