diff --git a/pyscf/pbc/dft/numint.py b/pyscf/pbc/dft/numint.py
index d660851343..7d36fffb6a 100644
--- a/pyscf/pbc/dft/numint.py
+++ b/pyscf/pbc/dft/numint.py
@@ -1069,6 +1069,7 @@ def block_loop(self, cell, grids, nao=None, deriv=0, kpt=None,
     nr_rks_fxc = nr_rks_fxc
     nr_uks_fxc = nr_uks_fxc
     nr_rks_fxc_st = nr_rks_fxc_st
+    nr_nlc_vxc = nr_nlc_vxc
 
     make_mask = staticmethod(make_mask)
     eval_ao = staticmethod(eval_ao)