diff --git a/db/migrate/20181207011115_downcase_custom_emoji_domains.rb b/db/migrate/20181207011115_downcase_custom_emoji_domains.rb
index 0497f7be10..b5fc70882e 100644
--- a/db/migrate/20181207011115_downcase_custom_emoji_domains.rb
+++ b/db/migrate/20181207011115_downcase_custom_emoji_domains.rb
@@ -3,11 +3,9 @@
 class DowncaseCustomEmojiDomains < ActiveRecord::Migration[5.2]
   disable_ddl_transaction!
 
-  class EmojiReaction < ApplicationRecord
-    # Dummy class, to make migration possible across version changes
-  end
-
   def up
+    CustomEmoji.connection.execute('CREATE TABLE IF NOT EXISTS emoji_reactions (id integer, custom_emoji_id integer, created_at datetime NOT NULL, updated_at datetime NOT NULL)')
+
     duplicates = CustomEmoji.connection.select_all('SELECT string_agg(id::text, \',\') AS ids FROM custom_emojis GROUP BY shortcode, lower(domain) HAVING count(*) > 1').to_ary
 
     duplicates.each do |row|
@@ -15,6 +13,8 @@ class DowncaseCustomEmojiDomains < ActiveRecord::Migration[5.2]
     end
 
     CustomEmoji.in_batches.update_all('domain = lower(domain)')
+
+    CustomEmoji.connection.execute('DROP TABLE IF EXISTS emoji_reactions')
   end
 
   def down; end