diff --git a/product/ERP5/__init__.py b/product/ERP5/__init__.py
index cff5ca9c38f9d5edc59ed56993aff417bc63579e..dec6e501a1104d9abc1c0226056fc7258adad6d3 100755
--- a/product/ERP5/__init__.py
+++ b/product/ERP5/__init__.py
@@ -73,6 +73,10 @@ def initialize( context ):
   import Document
   from zLOG import LOG
   LOG('In ERP5 initialize', 0, '')
+  # For compatibility
+  import Document
+  Document.PredicateGroup = Document.Predicate
+  # Initialize
   initializeProduct(context, this_module, globals(),
                          document_module = Document,
                          document_classes = document_classes,
@@ -80,3 +84,5 @@ def initialize( context ):
                          portal_tools = portal_tools,
                          content_constructors = content_constructors,
                          content_classes = content_classes)
+                         
+                         
\ No newline at end of file