diff --git a/grub-core/fs/zfs/zfs.c b/grub-core/fs/zfs/zfs.c
index 6a964974f..376042631 100644
--- a/grub-core/fs/zfs/zfs.c
+++ b/grub-core/fs/zfs/zfs.c
@@ -3349,6 +3349,8 @@ dnode_get_fullpath (const char *fullpath, struct subvolume *subvol,
       filename = 0;
       snapname = 0;
       fsname = grub_strdup (fullpath);
+      if (!fsname)
+	return grub_errno;
     }
   else
     {