diff --git a/lib/couchrest/casted_model.rb b/lib/couchrest/casted_model.rb
index a4ecdbf..8f0ed16 100644
--- a/lib/couchrest/casted_model.rb
+++ b/lib/couchrest/casted_model.rb
@@ -4,6 +4,7 @@ module CouchRest
     def self.included(base)
       base.send(:include, ::CouchRest::Mixins::Callbacks)
       base.send(:include, ::CouchRest::Mixins::Properties)
+      base.send(:include, ::CouchRest::Mixins::Assocations)
       base.send(:attr_accessor, :casted_by)
     end
     
diff --git a/spec/couchrest/assocations_spec.rb b/spec/couchrest/assocations_spec.rb
index 7382ae4..88ca2f6 100644
--- a/spec/couchrest/assocations_spec.rb
+++ b/spec/couchrest/assocations_spec.rb
@@ -77,3 +77,4 @@ describe "Assocations" do
   end
 
 end
+