diff --git a/mod/resource/lib.php b/mod/resource/lib.php
index 0a330fe374e..65ae201c914 100644
--- a/mod/resource/lib.php
+++ b/mod/resource/lib.php
@@ -256,7 +256,7 @@ function resource_get_coursemodule_info($coursemodule) {
     $files = $fs->get_area_files($context->id, 'mod_resource', 'content', 0, 'sortorder DESC, id ASC', false); // TODO: this is not very efficient!!
     if (count($files) >= 1) {
         $mainfile = reset($files);
-        $info->icon = file_file_icon($mainfile);
+        $info->icon = file_file_icon($mainfile, 24);
         $resource->mainfile = $mainfile->get_filename();
     }