diff --git a/src/tc_scf/fock_three_bi_ortho_new_new.irp.f b/src/tc_scf/fock_three_bi_ortho_new_new.irp.f
index f35e49c7..0e3aba61 100644
--- a/src/tc_scf/fock_three_bi_ortho_new_new.irp.f
+++ b/src/tc_scf/fock_three_bi_ortho_new_new.irp.f
@@ -86,3 +86,47 @@ BEGIN_PROVIDER [double precision, fock_a_tot_3e_bi_orth_new, (mo_num, mo_num)]
   enddo
  enddo
 END_PROVIDER 
+
+BEGIN_PROVIDER [double precision, fock_b_tot_3e_bi_orth_new, (mo_num, mo_num)]
+ implicit none
+ integer :: i,a,j,k
+ double precision :: contrib_sss, contrib_sos, contrib_soo
+ fock_b_tot_3e_bi_orth_new = 0.d0
+ do i = 1, mo_num
+  do a = 1, mo_num
+   
+   do j = 1, elec_beta_num
+    do k = 1, elec_beta_num
+      call contrib_3e_sss(a,i,j,k,contrib_sss)
+      call contrib_3e_soo(a,i,j,k,contrib_soo)
+      call contrib_3e_sos(a,i,j,k,contrib_sos)
+      fock_b_tot_3e_bi_orth_new(a,i) += 0.5d0 * (contrib_sss + contrib_soo) + contrib_sos
+    enddo
+   enddo
+
+   do j = elec_beta_num + 1, elec_alpha_num 
+    do k = 1, elec_beta_num
+      call contrib_3e_sss(a,i,j,k,contrib_sss)
+      fock_b_tot_3e_bi_orth_new(a,i) += 0.5d0 * contrib_sss 
+    enddo
+   enddo
+
+   do j = 1, elec_beta_num
+    do k = elec_beta_num+1, elec_alpha_num
+     call contrib_3e_soo(a,i,j,k,contrib_soo)
+     call contrib_3e_sos(a,i,j,k,contrib_sos)
+     fock_b_tot_3e_bi_orth_new(a,i) += 0.5d0 * contrib_soo + contrib_sos
+    enddo
+   enddo
+
+   do j = elec_beta_num + 1, elec_alpha_num
+    do k = elec_beta_num+1, elec_alpha_num
+     call contrib_3e_sss(a,i,j,k,contrib_sss)
+     fock_b_tot_3e_bi_orth_new(a,i) += 0.5d0 * contrib_sss
+    enddo
+   enddo
+
+  enddo
+ enddo
+
+END_PROVIDER