diff --git a/src/Davidson/diagonalization_hs2.irp.f b/src/Davidson/diagonalization_hs2.irp.f
index ffd8b971..0a2d5389 100644
--- a/src/Davidson/diagonalization_hs2.irp.f
+++ b/src/Davidson/diagonalization_hs2.irp.f
@@ -139,7 +139,7 @@ subroutine davidson_diag_hjj_sjj(dets_in,u_in,H_jj,s2_out,energies,dim_in,sze,N_
   write(iunit,'(A)') trim(write_buffer)
   write_buffer = ' Iter'
   do i=1,N_st
-    write_buffer = trim(write_buffer)//'      Energy          S^2      Residual  '
+    write_buffer = trim(write_buffer)//'      Energy          S^2      Residual    '
   enddo
   write(iunit,'(A)') trim(write_buffer)
   write_buffer = '===== '
diff --git a/src/Determinants/slater_rules.irp.f b/src/Determinants/slater_rules.irp.f
index 110d9014..51572462 100644
--- a/src/Determinants/slater_rules.irp.f
+++ b/src/Determinants/slater_rules.irp.f
@@ -1977,7 +1977,7 @@ subroutine ac_operator(iorb,ispin,key,hjj,Nint,na,nb)
   !DIR$ FORCEINLINE
   call bitstring_to_list_ab(key, occ, tmp, Nint)
   ASSERT (tmp(1) == elec_alpha_num)
-  ASSERT (tmp(2) == elec_alpha_num)
+  ASSERT (tmp(2) == elec_beta_num)
   
   k = ishft(iorb-1,-bit_kind_shift)+1
   ASSERT (k >0)