diff --git a/cif_ms.dic b/cif_ms.dic
index 9a5335c..dcbf307 100644
--- a/cif_ms.dic
+++ b/cif_ms.dic
@@ -24,7 +24,7 @@ data_CIF_MS
     _dictionary.formalism        Modulated
     _dictionary.class            Instance
     _dictionary.version          3.2.1
-    _dictionary.date             2024-05-17
+    _dictionary.date             2024-05-20
     _dictionary.uri              http://www.iucr.org/cif/dic/cif_ms.dic
     _dictionary.ddl_conformance  3.13.1
     _dictionary.namespace        ModStruct
@@ -4100,6 +4100,27 @@ save_atom_site_rot_Fourier.axis
 
 save_
 
+save_atom_site_rot_Fourier.id
+
+    _definition.id                '_atom_site_rot_Fourier.id'
+    loop_
+      _alias.definition_id
+          '_atom_site_rot_Fourier_id'
+    _definition.update            2024-05-20
+    _description.text
+;
+    A code identifying each component of the rotational modulation of a given
+    rigid group when the modulation is expressed in terms of Fourier series.
+;
+    _name.category_id             atom_site_rot_Fourier
+    _name.object_id               id
+    _type.purpose                 Key
+    _type.source                  Assigned
+    _type.container               Single
+    _type.contents                Word
+
+save_
+
 save_atom_site_rot_Fourier.matrix_seq_id
 
     _definition.id               '_atom_site_rot_Fourier.matrix_seq_id'
@@ -12858,7 +12879,7 @@ loop_
      Returned all additional indices to main dictionary, removed category_id
      from templates(James Hester)
 ;
-         3.2.1    2024-05-17
+         3.2.1    2024-05-20
 ;
      Corrected a typo in the definition of the _geom_torsion.angle data item.
 
@@ -12869,4 +12890,6 @@ loop_
      category name.
 
      Renamed the head category from 'MS_GROUP' to 'CIF_MS_HEAD'.
+
+     Restored the _atom_site_rot_Fourier.id data item.
 ;