diff --git a/grub-core/fs/f2fs.c b/grub-core/fs/f2fs.c
index 855e24618..db8a65f8d 100644
--- a/grub-core/fs/f2fs.c
+++ b/grub-core/fs/f2fs.c
@@ -872,6 +872,9 @@ grub_f2fs_mount (grub_disk_t disk)
   return data;
 
  fail:
+  if (grub_errno == GRUB_ERR_NONE)
+    grub_error (GRUB_ERR_BAD_FS, "not a F2FS filesystem");
+
   grub_free (data);
 
   return NULL;