diff --git a/papers/format.md b/papers/format.md
index 4ed81ac1e..3ee91ce80 100644
--- a/papers/format.md
+++ b/papers/format.md
@@ -222,6 +222,7 @@ size | description
      |   - 0xb6: OPN extended - 9 channels
      |   - 0xb7: PC-98 extended - 19 channels
      |   - 0xb8: YMZ280B - 8 channels
+     |   - 0xb9: Namco WSG - 3 channels
      |   - 0xde: YM2610B extended - 19 channels
      |   - 0xe0: QSound - 19 channels
      |   - 0xfd: Dummy System - 8 channels