diff --git a/src/mu_of_r/EZFIO.cfg b/src/mu_of_r/EZFIO.cfg
index a66b00ef..7a39b012 100644
--- a/src/mu_of_r/EZFIO.cfg
+++ b/src/mu_of_r/EZFIO.cfg
@@ -6,9 +6,9 @@ size: (becke_numerical_grid.n_points_final_grid,determinants.n_states)
 
 [mu_of_r_potential]
 type: character*(32)
-doc: type of potential for the mu(r) interaction: can be [ hf| cas_full | cas_truncated | pure_act]
+doc: type of potential for the mu(r) interaction: can be [ hf| hf_sparse | cas_full | cas_truncated | pure_act]
 interface: ezfio, provider, ocaml
-default: hf
+default: hf_sparse
 
 [io_mu_of_r]                                                                                                                      
 type: Disk_access