diff --git a/lib/stripe/stripe_object.rb b/lib/stripe/stripe_object.rb
index 4ea943e5..2b0509b2 100644
--- a/lib/stripe/stripe_object.rb
+++ b/lib/stripe/stripe_object.rb
@@ -262,9 +262,10 @@ module Stripe
       # TODO: only allow setting in updateable classes.
       if name.to_s.end_with?('=')
         attr = name.to_s[0...-1].to_sym
+        val = args.first
 
         # the second argument is only required when adding boolean accessors
-        add_accessors([attr], {})
+        add_accessors([attr], { attr => val })
 
         begin
           mth = method(name)
diff --git a/test/stripe/stripe_object_test.rb b/test/stripe/stripe_object_test.rb
index a5246a0c..b9598124 100644
--- a/test/stripe/stripe_object_test.rb
+++ b/test/stripe/stripe_object_test.rb
@@ -80,6 +80,13 @@ module Stripe
       refute obj.respond_to?(:not_bool?)
     end
 
+    should "assign question mark accessors for booleans added after initialization" do
+      obj = Stripe::StripeObject.new
+      obj.bool = true
+      assert obj.respond_to?(:bool?)
+      assert obj.bool?
+    end
+
     should "mass assign values with #update_attributes" do
       obj = Stripe::StripeObject.construct_from({ :id => 1, :name => 'Stripe' })
       obj.update_attributes(:name => 'STRIPE')