diff --git a/src/two_body_rdm/two_e_dm_mo.irp.f b/src/two_body_rdm/two_e_dm_mo.irp.f
index 19e8d75e..4dadd2e6 100644
--- a/src/two_body_rdm/two_e_dm_mo.irp.f
+++ b/src/two_body_rdm/two_e_dm_mo.irp.f
@@ -5,18 +5,14 @@ BEGIN_PROVIDER [double precision, two_e_dm_mo, (mo_num,mo_num,mo_num,mo_num)]
    !
    ! <Psi| a^{\dagger}_{i \beta} a^{\dagger}_{j \beta} a_{l \beta} a_{k \beta} |Psi>
    !
-   ! WHERE ALL ORBITALS (i,j,k,l) BELONGS TO ALL OCCUPIED ORBITALS : core, inactive and active
+   ! where the indices (i,j,k,l) belong to all MOs.
    !
-   ! THE NORMALIZATION (i.e. sum of diagonal elements) IS SET TO N_{elec} * (N_{elec} - 1)/2
+   ! The normalization (i.e. sum of diagonal elements) is set to $N_{elec} * (N_{elec} - 1)/2$
    !
-   !  !!!!! WARNING !!!!! ALL SLATER DETERMINANTS IN PSI_DET MUST BELONG TO AN ACTIVE SPACE DEFINED BY "list_act"
+   !  !!!!! WARNING !!!!! IF "no_core_density" then all elements involving at least one CORE MO are set to zero
+   ! The state-averaged two-electron energy :
    !
-   !  !!!!! WARNING !!!!! IF "no_core_density" then all elements involving at least one CORE MO is set to zero
-   ! The two-electron energy of each state can be computed as:
-   !
-   !   \sum_{i,j,k,l = 1, n_core_inact_act_orb} two_e_dm_mo(i,j,k,l,istate) * < ii jj | kk ll >
-   !
-   !   with ii = list_core_inact_act(i), jj = list_core_inact_act(j), kk = list_core_inact_act(k), ll = list_core_inact_act(l)
+   !   \sum_{i,j,k,l = 1, mo_num} two_e_dm_mo(i,j,k,l) * < ii jj | kk ll >
    END_DOC
    two_e_dm_mo = 0.d0
    integer                        :: i,j,k,l,iorb,jorb,korb,lorb,istate