diff --git a/EvasysPlugin.class.php b/EvasysPlugin.class.php
index 384d739..2a368e5 100644
--- a/EvasysPlugin.class.php
+++ b/EvasysPlugin.class.php
@@ -326,13 +326,15 @@ public function getIconNavigation($course_id, $last_visit, $user_id = null)
                 if (Config::get()->EVASYS_RED_ICONS_STOP_UNTIL > time()) {
                     $tab->setImage(Icon::create("evaluation", "new"), array('title' => _("Neue Evaluation")));
                 } else {
-                    $number = 0;
-                    foreach ($evasys_seminars as $evasys_seminar) {
-                        $number += $evasys_seminar->getEvaluationStatus();
-                    }
-                    if ($number > 0) {
-                        $tab->setImage(Icon::create("evaluation", "new"), ['title' => sprintf(_("%s neue Evaluation"), $number)]);
-                    }
+
+                    $icon_link = PluginEngine::getLink($this, array(), "icon/get/" . $course_id);
+                    $tab->setImage(
+                        Icon::create("evaluation", "inactive"),
+                        [
+                            'onload' => 'if(this.src != \'' . $icon_link .'\'){ this.src = \'' . $icon_link .'\';}',
+                            'title' => _("Evaluationen")
+                        ]);
+
                 }
             }
             return $tab;
diff --git a/controllers/icon.php b/controllers/icon.php
new file mode 100644
index 0000000..4563b17
--- /dev/null
+++ b/controllers/icon.php
@@ -0,0 +1,23 @@
+<?php
+
+class IconController extends PluginController {
+
+    public function get_action($course_id)
+    {
+        $evasys_seminars = EvasysSeminar::findBySeminar($course_id);
+        foreach ($evasys_seminars as $evasys_seminar) {
+            $number += $evasys_seminar->getEvaluationStatus();
+
+            if ($number > 0) break;
+        }
+        
+        $icon_url = Icon::create("evaluation", ($number > 0)?"new":"inactive")->asImagePath();
+        $icon_path = $GLOBALS['STUDIP_BASE_PATH'] . '/public' . parse_url($icon_url, PHP_URL_PATH);
+
+        header("Content-Type: image/svg+xml");
+        readfile($icon_path);
+
+        exit;
+    }
+
+}