diff --git a/chant_img.php b/chant_img.php
index ab68e24..29b18ff 100644
--- a/chant_img.php
+++ b/chant_img.php
@@ -81,6 +81,8 @@ function mgabc2tex($c, $firstverse = False) {
 	             'im' => False,
 	             'ky' => False,
 	             'of' => 'Offert',
+	             'or' => False,
+	             'pr' => False,
 	             'ps' => False,
 	             're' => 'Resp',
 	             'se' => 'Seq',