diff --git a/lib/paperclip/attachment.rb b/lib/paperclip/attachment.rb
index bb528e70a..e1a5987fb 100644
--- a/lib/paperclip/attachment.rb
+++ b/lib/paperclip/attachment.rb
@@ -240,7 +240,8 @@ def dirty?
     # the instance's errors and returns false, cancelling the save.
     def save
       flush_deletes unless @options[:keep_old_files]
-      if @options[:only_process].any? && !@options[:only_process].include?(:original)
+      process = only_process
+      if process.any? && !process.include?(:original)
         @queued_for_write.except!(:original)
       end
       flush_writes
diff --git a/spec/paperclip/attachment_spec.rb b/spec/paperclip/attachment_spec.rb
index 81f4d4bae..be7fdbae2 100644
--- a/spec/paperclip/attachment_spec.rb
+++ b/spec/paperclip/attachment_spec.rb
@@ -500,6 +500,7 @@
       @attachment.expects(:post_process).with(:thumb)
       @attachment.expects(:post_process).with(:large).never
       @attachment.assign(@file)
+      @attachment.save
     end
   end