diff --git a/lib/mastodon/media_cli.rb b/lib/mastodon/media_cli.rb
index affc4cedb256bae37d9d2a21d489d1b8c29343d9..99660dd1d9af4867348957d602540119ed3f0b11 100644
--- a/lib/mastodon/media_cli.rb
+++ b/lib/mastodon/media_cli.rb
@@ -53,7 +53,7 @@ module Mastodon
             Maintenance::UncacheMediaWorker.new.perform(m) unless options[:dry_run]
             options[:verbose] ? say(m.id) : say('.', :green, false)
             processed += 1
-            size      += m.file_file_size
+            size      += m.file_file_size || 0
           end
         end
       end