diff --git a/src/ext/json.php b/src/ext/json.php
index 59301d0..615809c 100644
--- a/src/ext/json.php
+++ b/src/ext/json.php
@@ -2,7 +2,6 @@
 namespace nur\sery\ext;
 
 use Exception;
-use nur\sery\cl;
 use nur\sery\ext\json\JsonException;
 use nur\sery\file;
 use nur\sery\os\IOException;
diff --git a/src/file.php b/src/file.php
index 784b910..c5c30a4 100644
--- a/src/file.php
+++ b/src/file.php
@@ -12,7 +12,7 @@ use nur\sery\file\TmpfileWriter;
  * Class file: outils pour gérer les fichiers
  */
 class file {
-  private static function fix_dash($file) {
+  static function fix_dash($file) {
     if ($file === "-") $file = null;
     return $file;
   }
diff --git a/src/file/csv/CsvReader.php b/src/file/csv/CsvReader.php
index 3eb3f9d..4fe6287 100644
--- a/src/file/csv/CsvReader.php
+++ b/src/file/csv/CsvReader.php
@@ -1,6 +1,7 @@
 <?php
 namespace nur\sery\file\csv;
 
+use nur\sery\file;
 use nur\sery\file\FileReader;
 
 class CsvReader extends AbstractReader {
@@ -17,7 +18,7 @@ class CsvReader extends AbstractReader {
   protected ?string $inputEncoding;
 
   function getIterator() {
-    $reader = new FileReader($this->input);
+    $reader = new FileReader(file::fix_dash($this->input));
     $inputEncoding = $this->inputEncoding;
     if ($inputEncoding !== null) {
       $reader->appendFilter("convert.iconv.$inputEncoding.utf-8");