diff --git a/grub-core/fs/zfs/zfsinfo.c b/grub-core/fs/zfs/zfsinfo.c
index c8a28acf5..bf2918018 100644
--- a/grub-core/fs/zfs/zfsinfo.c
+++ b/grub-core/fs/zfs/zfsinfo.c
@@ -358,8 +358,8 @@ grub_cmd_zfs_bootfs (grub_command_t cmd __attribute__ ((unused)), int argc,
     return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("one argument expected"));
 
   devname = grub_file_get_device_name (args[0]);
-  if (grub_errno)
-    return grub_errno;
+  if (devname == NULL)
+    return GRUB_ERR_OUT_OF_MEMORY;
 
   dev = grub_device_open (devname);
   grub_free (devname);