diff --git a/product/CMFCategory/PropertySheet/BaseCategory.py b/product/CMFCategory/PropertySheet/BaseCategory.py
index 0ece10a3c77f3d62e94e865a97af40323113c504..33fd2a26a9ae0c8e9e6d408dc3be16e9a57cf335 100755
--- a/product/CMFCategory/PropertySheet/BaseCategory.py
+++ b/product/CMFCategory/PropertySheet/BaseCategory.py
@@ -83,6 +83,11 @@ class BaseCategory:
             'type'        : 'string',
             'default'     : None,
             'mode'        : 'w' },
+        {   'id'          : 'category_type',
+            'description' : 'Category types to group categories for portal methods',
+            'type'        : 'lines',
+            'default'     : [],
+            'mode'        : 'w' },
     )