diff --git a/lib/cocoon/view_helpers.rb b/lib/cocoon/view_helpers.rb
index 59e080b..ceff81b 100644
--- a/lib/cocoon/view_helpers.rb
+++ b/lib/cocoon/view_helpers.rb
@@ -102,6 +102,8 @@ module Cocoon
     private
 
     def create_object_on_non_association(f, association)
+      builder_method = "build_#{association}"
+      return f.object.send(builder_method) if f.object.respond_to?(builder_method)
       raise "Association #{association} doesn't exist on #{f.object.class}"
     end
 
diff --git a/spec/cocoon_spec.rb b/spec/cocoon_spec.rb
index 57522aa..192a485 100644
--- a/spec/cocoon_spec.rb
+++ b/spec/cocoon_spec.rb
@@ -193,14 +193,13 @@ describe Cocoon do
       end
 
       it "should raise error if cannot reflect on association" do
-        expect { @tester.create_object(stub(:object => Comment.new), :not_existing) }.to raise_error /exist/
+        expect { @tester.create_object(stub(:object => Comment.new), :not_existing) }.to raise_error /association/i
       end
 
       it "should create an association if object responds to 'build_association' as singular" do
-        pending 'WIP'
         object = Comment.new
         object.should_receive(:build_custom_item).and_return 'custom'
-        @tester.create_object(stub(:object => Comment.new), :custom_item).should == 'custom'
+        @tester.create_object(stub(:object => object), :custom_item).should == 'custom'
       end
     end