diff --git a/mod/glossary/lib.php b/mod/glossary/lib.php
index 9c3f235f7e4..11d6a21e5d3 100644
--- a/mod/glossary/lib.php
+++ b/mod/glossary/lib.php
@@ -4168,7 +4168,8 @@ function glossary_check_updates_since(cm_info $cm, $from, $filter = array()) {
  */
 function mod_glossary_get_fontawesome_icon_map() {
     return [
-        'mod_glossary:export' => 'fa-download'
+        'mod_glossary:export' => 'fa-download',
+        'mod_glossary:minus' => 'fa-minus'
     ];
 }