diff --git a/plugins/MRCC_Utils/mrcc_utils.irp.f b/plugins/MRCC_Utils/mrcc_utils.irp.f
index 80fdd4c7..25e6af77 100644
--- a/plugins/MRCC_Utils/mrcc_utils.irp.f
+++ b/plugins/MRCC_Utils/mrcc_utils.irp.f
@@ -21,7 +21,8 @@ BEGIN_PROVIDER [ double precision, lambda_mrcc, (N_states,psi_det_size) ]
         endif
         lambda_mrcc(k,i) = min(0.d0,psi_non_ref_coef(i,k)/ihpsi_current(k) )
         lambda_pert = 1.d0 / (psi_ref_energy_diagonalized(k)-hii)
-        if (lambda_pert / lambda_mrcc(k,i)  < 0.5d0 ) then
+        if ((lambda_pert  < 0.5d0 * lambda_mrcc(k,i)).or.  &
+            (lambda_pert  > 2.0d0 * lambda_mrcc(k,i)) ) then
           i_pert_count += 1
           lambda_mrcc(k,i) = 0.d0
         endif