diff --git a/org/qmckl_jastrow.org b/org/qmckl_jastrow.org
index a177d91..eabde1e 100644
--- a/org/qmckl_jastrow.org
+++ b/org/qmckl_jastrow.org
@@ -1735,7 +1735,8 @@ end function qmckl_compute_factor_ee_f
     factor_ee[nw] = 0.0; // put init array here.
     for (int i = 0; i < elec_num; ++i ) {
       for (int j = 0; j < i; ++j) {
-        x = ee_distance_rescaled[j * (walk_num * elec_num) + i * (walk_num) + nw];
+        //x = ee_distance_rescaled[j * (walk_num * elec_num) + i * (walk_num) + nw];
+        x = ee_distance_rescaled[j + i * elec_num + nw*(elec_num * elec_num)];
         x1 = x;
         power_ser = 0.0;
         spin_fact = 1.0;