diff --git a/src/davidson/diagonalize_ci.irp.f b/src/davidson/diagonalize_ci.irp.f
index 06744934..da5fb950 100644
--- a/src/davidson/diagonalize_ci.irp.f
+++ b/src/davidson/diagonalize_ci.irp.f
@@ -57,8 +57,8 @@ END_PROVIDER
    enddo
 
 !   Deactivated temporarily: bug in N_csf
-   do_csf = s2_eig .and. only_expected_s2 .and. (expected_s2 == 0.d0)
-!   do_csf = .False.
+!   do_csf = s2_eig .and. only_expected_s2 .and. (expected_s2 == 0.d0)
+   do_csf = .False.
 
    if (diag_algorithm == "Davidson") then