diff --git a/product/ERP5Type/mixin/matrix.py b/product/ERP5Type/mixin/matrix.py
index db47bfa24ef62e5f0a1cbbf69d02bf5020040e27..8101b17b760bbddfc7c331b5e04ce371851ee6b2 100644
--- a/product/ERP5Type/mixin/matrix.py
+++ b/product/ERP5Type/mixin/matrix.py
@@ -583,3 +583,4 @@ class Matrix(object):
       LOG('XMLMatrix notifyAfterUpdateRelatedContent _renameCellRange', 0, str(new_cell_range))
       self._renameCellRange(*new_cell_range,**kwd)
 
+InitializeClass(Matrix)