diff --git a/html/launcher.php b/html/launcher.php
index 5c036a9..9a3ddc4 100755
--- a/html/launcher.php
+++ b/html/launcher.php
@@ -419,8 +419,9 @@ if ($type == "upload_firmware") {
 
     // Check file upload
     if (!isset($_FILES['firmware_file']) || $_FILES['firmware_file']['error'] !== UPLOAD_ERR_OK) {
+        $max_upload = ini_get('upload_max_filesize');
         $upload_errors = [
-            UPLOAD_ERR_INI_SIZE => 'File exceeds server upload limit',
+            UPLOAD_ERR_INI_SIZE => "Le fichier depasse la limite serveur (actuellement $max_upload). Effectuez d'abord une mise a jour via WiFi (bouton Update firmware) pour debloquer l'upload hors-ligne.",
             UPLOAD_ERR_FORM_SIZE => 'File exceeds form upload limit',
             UPLOAD_ERR_PARTIAL => 'File was only partially uploaded',
             UPLOAD_ERR_NO_FILE => 'No file was uploaded',