diff --git a/src/yunohost/backup.py b/src/yunohost/backup.py
index 745291fb1..d98250629 100644
--- a/src/yunohost/backup.py
+++ b/src/yunohost/backup.py
@@ -1746,8 +1746,8 @@ class CopyBackupMethod(BackupMethod):
             return
         else:
             logger.warning(m18n.n("bind_mouting_disable"))
-            subprocess.call(["mountpoint", "-q", dest,
-                            "&&", "umount", "-R", dest])
+            subprocess.call(["mountpoint", "-q", self.work_dir,
+                            "&&", "umount", "-R", self.work_dir])
             raise YunohostError('backup_cant_mount_uncompress_archive')