diff --git a/extensions/pyRevitTutor.extension/pyRevitTutor.tab/Sessions.panel/Session 4.pushbutton/firsttransaction_script.py b/extensions/pyRevitTutor.extension/pyRevitTutor.tab/Sessions.panel/Session 4.pushbutton/firsttransaction_script.py
index 7652271cf..61d0de408 100644
--- a/extensions/pyRevitTutor.extension/pyRevitTutor.tab/Sessions.panel/Session 4.pushbutton/firsttransaction_script.py	
+++ b/extensions/pyRevitTutor.extension/pyRevitTutor.tab/Sessions.panel/Session 4.pushbutton/firsttransaction_script.py	
@@ -3,7 +3,7 @@
 __title__ = 'First\nTransactions'
 
 
-from Autodesk.Revit.DB import FilteredElementCollector, BuiltInCategory, Transaction, TransactionGroup
+from Autodesk.Revit.DB import FilteredElementCollector, BuiltInCategory, Transaction, TransactionGroup, BuildInParameter
 
 doc = __revit__.ActiveUIDocument.Document
 
@@ -23,7 +23,7 @@
 t.Start()
 
 for sheet in sheets_collector:
-    custom_param = sheet.Parameter[DB.BuiltInParameter.ALL_MODEL_INSTANCE_COMMENTS]
+    custom_param = sheet.Parameter[BuiltInParameter.ALL_MODEL_INSTANCE_COMMENTS]
     if custom_param:
         custom_param.Set("Example value")
 
@@ -38,4 +38,4 @@
 
 t.Commit()
 
-tg.Assimilate()
\ No newline at end of file
+tg.Assimilate()