diff --git a/src/app/convert/controllers/ConvertThumbnailController.php b/src/app/convert/controllers/ConvertThumbnailController.php
index c07dcafab95e582de2070368a44643066fb587c4..ef30878ab1f9646e7477e5e9e11e91930d174061 100644
--- a/src/app/convert/controllers/ConvertThumbnailController.php
+++ b/src/app/convert/controllers/ConvertThumbnailController.php
@@ -57,8 +57,9 @@ class ConvertThumbnailController
         }
 
         $ext = pathinfo($pathToDocument, PATHINFO_EXTENSION);
+        $filename = pathinfo($pathToDocument, PATHINFO_FILENAME);
         $tmpPath = CoreConfigModel::getTmpPath();
-        $fileNameOnTmp = rand() . basename($pathToDocument);
+        $fileNameOnTmp = rand() . $filename;
 
         if (in_array($ext, ['maarch', 'html'])) {
             if ($ext == 'maarch') {