diff --git a/product/ERP5/Document/Event.py b/product/ERP5/Document/Event.py
index 8fc8f3b6e7f20757952eda137605042400b9d0e3..0751e81f79fa6eae10c99d64865a58862de2c2d6 100644
--- a/product/ERP5/Document/Event.py
+++ b/product/ERP5/Document/Event.py
@@ -84,8 +84,9 @@ class Event(EmailDocument, Movement):
       """
       return 1
 
-    security.declareProtected(Permissions.AccessContentsInformation, 'defQuantity')
-    def defQuantity(self):
+    security.declareProtected(Permissions.AccessContentsInformation, 
+                              'getQuantity')
+    def getQuantity(self):
       """
         Quantity is set automatically on Events.
       """