diff --git a/chant_img.php b/chant_img.php
index 29b18ff..2bf3aa4 100644
--- a/chant_img.php
+++ b/chant_img.php
@@ -85,6 +85,7 @@ function mgabc2tex($c, $firstverse = False) {
 	             'pr' => False,
 	             'ps' => False,
 	             're' => 'Resp',
+	             'rb' => 'R. br',
 	             'se' => 'Seq',
 	             'tr' => 'Tract',
 	             'va' => False);
diff --git a/include/txt.php b/include/txt.php
index e4c81d5..9d46c18 100644
--- a/include/txt.php
+++ b/include/txt.php
@@ -14,6 +14,7 @@ $txt['usage']['ky'] = 'Kyriale';
 $txt['usage']['of'] = 'Offertorium';
 $txt['usage']['ps'] = 'Psalmus';
 $txt['usage']['re'] = 'Responsorium';
+$txt['usage']['rb'] = 'Responsorium brevis';
 $txt['usage']['se'] = 'Sequentia';
 $txt['usage']['tr'] = 'Tractus';
 $txt['usage']['or'] = 'Toni Communes';
@@ -33,6 +34,7 @@ $txt['usage_s']['ky'] = '';
 $txt['usage_s']['of'] = 'Offert';
 $txt['usage_s']['ps'] = '';
 $txt['usage_s']['re'] = 'Resp';
+$txt['usage_s']['rb'] = 'R. br';
 $txt['usage_s']['se'] = 'Seq';
 $txt['usage_s']['tr'] = 'Tract';
 $txt['usage_s']['or'] = '';