diff --git a/cif_ms.dic b/cif_ms.dic
index c487cdd..887bece 100644
--- a/cif_ms.dic
+++ b/cif_ms.dic
@@ -1896,6 +1896,8 @@ save_ATOM_SITE_DISPLACE_FOURIER
 
         # - - - - data truncated for brevity - - - -
 
+        _cell.modulation_dimension               2
+
         loop_
          _cell_wave_vector.seq_id
          _cell_wave_vector.xyz
@@ -2175,6 +2177,8 @@ save_ATOM_SITE_DISPLACE_FOURIER_PARAM
 
         # - - - - data truncated for brevity - - - -
 
+        _cell.modulation_dimension               2
+
         loop_
          _cell_wave_vector.seq_id
          _cell_wave_vector.xyz
@@ -3211,6 +3215,8 @@ save_ATOM_SITE_DISPLACE_SAWTOOTH
        structures.
 ;
 ;
+       #\#CIF_2.0
+
        # Same example using vectors
 
        # - - - - data truncated for brevity - - - -