diff --git a/product/ERP5Form/MatrixBox.py b/product/ERP5Form/MatrixBox.py
index 317d276043e676fa06e9a0f63ed3254917193a3e..e72ff6dd8cc4ad507a06f9e2d2f52539ccae9b02 100755
--- a/product/ERP5Form/MatrixBox.py
+++ b/product/ERP5Form/MatrixBox.py
@@ -59,8 +59,8 @@ class MatrixBoxWidget(Widget.Widget):
 
     """
     property_names = Widget.Widget.property_names +\
-                     ['cell_base_id', 'lines', 'columns', 'tabs',
-                      'getter_method' ,
+                     ['cell_base_id', 'cell_portal_type',
+                      'lines', 'columns', 'tabs', 'getter_method' ,
                       'editable_attributes' , 'global_attributes',
                       'update_cell_range'
                        ]
@@ -133,6 +133,13 @@ class MatrixBoxWidget(Widget.Widget):
                                  default='cell',
                                  required=0)
 
+    cell_portal_type = fields.StringField('cell_portal_type',
+                                 title='Portal Type for cells',
+                                 description=("""
+        The Portal Type for cells : This is the portal type used to construct a new cell."""),
+                                 default='Mapped Value',
+                                 required=0)
+
     update_cell_range = fields.CheckBoxField('update_cell_range',
                                   title="Update Cell Range",
                                   description=(