diff --git a/scripts/adb-rimo-import/rimo-import-test.php b/scripts/adb-rimo-import/rimo-import-test.php
index d514988fe..0af949a22 100755
--- a/scripts/adb-rimo-import/rimo-import-test.php
+++ b/scripts/adb-rimo-import/rimo-import-test.php
@@ -565,7 +565,7 @@ foreach($netowners as $apiOwner) {
       
       // save address errors
       if($addressErrors) {
-        $netzname = preg_replace('/[^a-z0-9.-]+/',"_",$adb_netzgebiet->name);
+        $netzname = preg_replace('/[^a-z0-9.-]/i',"_",$adb_netzgebiet->name);
         
         $out_folder = dirname(__FILE__)."/output/$starttime";
         if(!file_exists($out_folder)) {