diff --git a/lib/mvcfronk/mfUpload/mfUpload_TmpFile.php b/lib/mvcfronk/mfUpload/mfUpload_TmpFile.php
index d3c8045c9..d8c21fe51 100644
--- a/lib/mvcfronk/mfUpload/mfUpload_TmpFile.php
+++ b/lib/mvcfronk/mfUpload/mfUpload_TmpFile.php
@@ -89,8 +89,8 @@ class mfUpload_TmpFile {
 			return false;
 		}
 		
-		$filename = preg_replace('/[^a-z0-9$()+%äöüß._-]/i', '_', $filename);
-    $filename = preg_replace('/[^a-z0-9$()+%äöüß\[\]&#;,._-]/i', '_', $filename);
+		$filename = preg_replace('/[^a-z0-9$()+%äöüÄÖÜß._-]/i', '_', $filename);
+        $filename = preg_replace('/[^a-z0-9$()+%äöüÄÖÜß\[\]&#;,._-]/i', '_', $filename);
 
 		$parts = explode(".",$filename);
 		$ext = strtolower(array_pop($parts));