diff --git a/Modules/Glossary/classes/class.ilObjGlossaryGUI.php b/Modules/Glossary/classes/class.ilObjGlossaryGUI.php
index eccaa4ee4860..fa86581073ec 100755
--- a/Modules/Glossary/classes/class.ilObjGlossaryGUI.php
+++ b/Modules/Glossary/classes/class.ilObjGlossaryGUI.php
@@ -904,11 +904,11 @@ public function publishExportFile(): void
     {
         $files = $this->edit_request->getFiles();
         if (count($files) == 0) {
-            $this->tpl->setOnScreenMessage('failure', $this->lng->txt("no_checkbox"));
+            $this->tpl->setOnScreenMessage('failure', $this->lng->txt("no_checkbox"), true);
             $this->ctrl->redirectByClass("ilexportgui", "");
         }
         if (count($files) > 1) {
-            $this->tpl->setOnScreenMessage('failure', $this->lng->txt("cont_select_max_one_item"));
+            $this->tpl->setOnScreenMessage('failure', $this->lng->txt("cont_select_max_one_item"), true);
             $this->ctrl->redirectByClass("ilexportgui", "");
         }