diff --git a/sse_stream.rb b/sse_stream.rb
index ad3b0e8..36fe497 100644
--- a/sse_stream.rb
+++ b/sse_stream.rb
@@ -111,7 +111,7 @@ Plugin.create(:worldon) do
datasources[slug] = "Mastodonリスト(Worldon)/#{world.account.acct}/#{l[:title]}"
end
else
- warn '[worldon] failed to get lists:' + lists['error'].to_s
+ warn '[worldon] failed to get lists:'# + lists['error'].to_s
end
[datasources.merge(dss)]
end