diff --git a/app/helpers/comments_helper.rb b/app/helpers/comments_helper.rb
index 5c41b3432..b6d066935 100644
--- a/app/helpers/comments_helper.rb
+++ b/app/helpers/comments_helper.rb
@@ -1,11 +1,11 @@
 module CommentsHelper
 
   def comment_link_text(parent)
-    parent.class == Debate ? t("comments_helper.comment_link") : t("comments_helper.reply_link")
+    parent.is_a? Comment ? t("comments_helper.reply_link") : t("comments_helper.comment_link")
   end
 
   def comment_button_text(parent)
-    parent.class == Debate ? t("comments_helper.comment_button") : t("comments_helper.reply_button")
+    parent.is_a? Comment ? t("comments_helper.reply_button") : t("comments_helper.comment_button")
   end
 
 end
\ No newline at end of file