diff --git a/lib/filesystem/StandardFile.php b/lib/filesystem/StandardFile.php
index 73ba43bbe7563a3af85b6a208a20e39e67ed5cbb..208e447f35a596f1108bbffa2dbb92ae6ab15284 100644
--- a/lib/filesystem/StandardFile.php
+++ b/lib/filesystem/StandardFile.php
@@ -310,7 +310,7 @@ class StandardFile implements FileType, ArrayAccess
                 URLHelper::getURL('dispatch.php/file/suggest_oer/' . $this->fileref->id),
                 _('Material für OER Campus vorschlagen'),
                 Icon::create('oer-campus'),
-                ['data-dialog' => 'reload-on-close']
+                ['data-dialog' => 'reload-on-close;size=auto']
             );
         }