diff --git a/product/ERP5/mixin/downloadable.py b/product/ERP5/mixin/downloadable.py
index 2fbfbb0e30fc3f627ccb886401109daba611926b..1f8a5ad5fff248e9d9b59518751edb94b99f44a3 100644
--- a/product/ERP5/mixin/downloadable.py
+++ b/product/ERP5/mixin/downloadable.py
@@ -102,7 +102,7 @@ class DownloadableMixin:
       RESPONSE.setHeader('Content-Type', mime)
     if output_format not in (VALID_TEXT_FORMAT_LIST + VALID_IMAGE_FORMAT_LIST):
       # need to return it as attachment
-      filename = self.getStandardFileName(format=format)
+      filename = self.getStandardFilename(format=format)
       RESPONSE.setHeader('Content-Disposition',
                          'attachment; filename="%s"' % filename)
       RESPONSE.setHeader('Accept-Ranges', 'bytes')