diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index 71c686d..5ab80ed 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -245,7 +245,7 @@
 	}
 	exp_readunlock();
 	if (err == 0)
-		err = res->fh_size + (int)&((struct knfsd_fh*)0)->fh_base;
+		err = res->fh_size + offsetof(struct knfsd_fh, fh_base);
  out:
 	return err;
 }