diff --git a/admin/modules.php b/admin/modules.php
index fb112e7afc3..01f67a11666 100644
--- a/admin/modules.php
+++ b/admin/modules.php
@@ -87,9 +87,13 @@
     $table->set_attribute('class', 'admintable generaltable');
     $table->setup();
 
-    foreach ($modules as $module) {
+    $pluginmanager = core_plugin_manager::instance();
 
-        if (!file_exists("$CFG->dirroot/mod/$module->name/lib.php")) {
+    foreach ($modules as $module) {
+        $plugininfo = $pluginmanager->get_plugin_info('mod_'.$module->name);
+        $status = $plugininfo->get_status();
+
+        if ($status === core_plugin_manager::PLUGIN_STATUS_MISSING) {
             $strmodulename = '<span class="notifyproblem">'.$module->name.' ('.get_string('missingfromdisk').')</span>';
             $missing = true;
         } else {