diff --git a/lib/twilio-ruby/rest/instance_resource.rb b/lib/twilio-ruby/rest/instance_resource.rb
index f2e3e3a72..d4faf8e3c 100644
--- a/lib/twilio-ruby/rest/instance_resource.rb
+++ b/lib/twilio-ruby/rest/instance_resource.rb
@@ -82,20 +82,6 @@ def set_up_properties_from(hash)
         end
         @updated = !hash.keys.empty?
       end
-
-      def resource(*resources)
-        custom_resource_names = {:sms => 'SMS', :sip => 'SIP'}
-        resources.each do |r|
-          resource = twilify r
-          relative_path = custom_resource_names.fetch(r, resource)
-          path = "#{@path}/#{relative_path}"
-          enclosing_module = @submodule == nil ? (Twilio::REST) : (Twilio::REST.const_get(@submodule))
-          resource_class = enclosing_module.const_get resource
-          instance_variable_set("@#{r}", resource_class.new(path, @client))
-        end
-        self.class.instance_eval {attr_reader *resources}
-      end
-
     end
   end
 end
diff --git a/lib/twilio-ruby/rest/list_resource.rb b/lib/twilio-ruby/rest/list_resource.rb
index 295046da1..b4a564954 100644
--- a/lib/twilio-ruby/rest/list_resource.rb
+++ b/lib/twilio-ruby/rest/list_resource.rb
@@ -95,22 +95,6 @@ def create(params={})
         @instance_class.new "#{@path}/#{response[@instance_id_key]}", @client,
           response
       end
-
-      def resource(*resources)
-        custom_resource_names = {
-          :sms => 'SMS',
-          :sip => 'SIP',
-        }
-        resources.each do |r|
-          resource = twilify r
-          relative_path = custom_resource_names.fetch(r, resource)
-          path = "#{@path}/#{relative_path}"
-          enclosing_module = @submodule == nil ? (Twilio::REST) : (Twilio::REST.const_get(@submodule))
-          resource_class = enclosing_module.const_get resource
-          instance_variable_set("@#{r}", resource_class.new(path, @client))
-        end
-        self.class.instance_eval {attr_reader *resources}
-      end
     end
   end
 end
diff --git a/lib/twilio-ruby/rest/utils.rb b/lib/twilio-ruby/rest/utils.rb
index fb6cdffd9..214619904 100644
--- a/lib/twilio-ruby/rest/utils.rb
+++ b/lib/twilio-ruby/rest/utils.rb
@@ -20,6 +20,23 @@ def detwilify(something)
         end
       end
 
+      protected
+
+      def resource(*resources)
+        custom_resource_names = {
+          :sms => 'SMS',
+          :sip => 'SIP'
+        }
+        resources.each do |r|
+          resource = twilify r
+          relative_path = custom_resource_names.fetch(r, resource)
+          path = "#{@path}/#{relative_path}"
+          enclosing_module = @submodule == nil ? (Twilio::REST) : (Twilio::REST.const_get(@submodule))
+          resource_class = enclosing_module.const_get resource
+          instance_variable_set("@#{r}", resource_class.new(path, @client))
+        end
+        self.class.instance_eval {attr_reader *resources}
+      end
     end
   end
 end