diff --git a/include/txt.php b/include/txt.php
index 4713791..1d67ef8 100644
--- a/include/txt.php
+++ b/include/txt.php
@@ -18,7 +18,7 @@ $txt['usage']['re'] = 'Responsorium';
 $txt['usage']['rb'] = 'Responsorium breve';
 $txt['usage']['rh'] = 'Rhythmus';
 $txt['usage']['se'] = 'Sequentia';
-$txt['usage']['se'] = 'Supplicatio';
+$txt['usage']['su'] = 'Supplicatio';
 $txt['usage']['tr'] = 'Tractus';
 $txt['usage']['tp'] = 'Tropa';
 $txt['usage']['or'] = 'Toni Communes';