Wall Street was prepared for Spotify’s listing on the New York Stock Exchange this morning.

Analysts were ready with their reports. The tech media was closely watching Spotify’s unusual direct listing. Gene Simmons of Kiss appeared on CNBC, representing the skeptical artist position on the streaming economy.

The exchange itself, however, didn’t have things quite right. In a botched attempt at hospitality, the Big Board marked the occasion by flying the red and white flag of Switzerland outside its building at 11 Wall Street — but Spotify has its headquarters in Stockholm, Sweden.

The error was quickly corrected, with a blue and yellow Swedish flag taking the place of the Swiss banner. But by then it was too late — Scandinavian Twitter had captured the mix-up.