diff --git a/_plugins/empty_front_matter_note_injector.rb b/_plugins/empty_front_matter_note_injector.rb
index c4979c9..83fd4b2 100644
--- a/_plugins/empty_front_matter_note_injector.rb
+++ b/_plugins/empty_front_matter_note_injector.rb
@@ -10,7 +10,9 @@ JEKYLL
 Jekyll::Hooks.register :site, :after_init do |site|
   Dir.glob(site.collections['notes'].relative_directory + '/**/*.md').each do |filename|
     raw_note_content = File.read(filename)
-    raw_note_content.prepend(EMPTY_FRONT_MATTER) unless raw_note_content.start_with?('---')
-    File.write(filename, raw_note_content)
+    unless raw_note_content.start_with?('---')
+      raw_note_content.prepend(EMPTY_FRONT_MATTER)
+      File.write(filename, raw_note_content)
+    end
   end
 end