diff --git a/app/presenters/post_presenter.rb b/app/presenters/post_presenter.rb
index 1433c9145..7a2e33847 100644
--- a/app/presenters/post_presenter.rb
+++ b/app/presenters/post_presenter.rb
@@ -71,7 +71,7 @@ class PostPresenter < Presenter
   def humanized_essential_tag_string
     string = []
 
-    if !@post.rating == "s"
+    if @post.rating != "s"
       string << "#r-18"
     end