diff --git a/participants.php b/participants.php
index a8846666..4576ed7f 100644
--- a/participants.php
+++ b/participants.php
@@ -166,7 +166,8 @@
         'export' => 'xls',
     ]);
     $xlsstring = get_string('application/vnd.ms-excel', 'mimetypes');
-    $xlsicon = html_writer::img($OUTPUT->image_url('f/spreadsheet'), $xlsstring, ['title' => $xlsstring]);
+    $xlsicon = html_writer::img($OUTPUT->image_url('f/spreadsheet'), $xlsstring,
+        ['title' => $xlsstring, 'class' => 'mimetypeicon']);
     echo get_string('export', 'mod_zoom') . ': ' . html_writer::link($exporturl, $xlsicon);
 
     echo $OUTPUT->footer();
diff --git a/styles.css b/styles.css
index f05a3c52..a695cb2f 100644
--- a/styles.css
+++ b/styles.css
@@ -42,3 +42,8 @@
     border: none;
 }
 
+#page-mod-zoom-participants .mimetypeicon {
+    width: 24px;
+    height: 24px;
+}
+