diff --git a/app/controllers/articles_controller.rb b/app/controllers/articles_controller.rb
index b29fd594..c9dd1362 100644
--- a/app/controllers/articles_controller.rb
+++ b/app/controllers/articles_controller.rb
@@ -7,12 +7,12 @@ class ArticlesController < ApplicationController
       sort = case params['sort']
                when "name"  then "articles.name"
                when "unit"   then "articles.unit"
-               when "category" then "article_categories.name"
+               when "article_category" then "article_categories.name"
                when "note"   then "articles.note"
                when "availability" then "articles.availability"
                when "name_reverse"  then "articles.name DESC"
                when "unit_reverse"   then "articles.unit DESC"
-               when "category_reverse" then "article_categories.name DESC"
+               when "article_category_reverse" then "article_categories.name DESC"
                when "note_reverse" then "articles.note DESC"
                when "availability_reverse" then "articles.availability DESC"
                end
diff --git a/app/views/articles/_articles.html.haml b/app/views/articles/_articles.html.haml
index e8a1c7b1..283abc53 100644
--- a/app/views/articles/_articles.html.haml
+++ b/app/views/articles/_articles.html.haml
@@ -8,7 +8,7 @@
       %th
       %th= sort_link_helper heading_helper(Article, :name), "name"
       %th
-      %th= sort_link_helper heading_helper(Article, :category), "category"
+      %th= sort_link_helper heading_helper(Article, :article_category), "article_category"
       %th= sort_link_helper heading_helper(Article, :unit), "unit"
       %th= sort_link_helper heading_helper(Article, :note), "note"
       %th{:style => "width: 4em;"}= heading_helper Article, :unit_quantity, short: true