diff --git a/lib/mastodon/media_cli.rb b/lib/mastodon/media_cli.rb
index b4ad78fe5..08a8f1093 100644
--- a/lib/mastodon/media_cli.rb
+++ b/lib/mastodon/media_cli.rb
@@ -115,7 +115,7 @@ module Mastodon
       when :filesystem
         require 'find'
 
-        root_path = ENV.fetch('RAILS_ROOT_PATH', File.join(':rails_root', 'public', 'system')).gsub(':rails_root', Rails.root.to_s)
+        root_path = ENV.fetch('PAPERCLIP_ROOT_PATH', File.join(':rails_root', 'public', 'system')).gsub(':rails_root', Rails.root.to_s)
 
         Find.find(File.join(*[root_path, prefix].compact)) do |path|
           next if File.directory?(path)