diff --git a/product/ERP5/Tool/AlarmTool.py b/product/ERP5/Tool/AlarmTool.py
index 9c77e3d35cf29fa0e06e898774daff924e58d701..d5453faa558afbddc261a182ec098f1ff07a7522 100755
--- a/product/ERP5/Tool/AlarmTool.py
+++ b/product/ERP5/Tool/AlarmTool.py
@@ -42,7 +42,7 @@ from DateTime import DateTime
 try:
   from Products.TimerService import getTimerService
 except ImportError:
-  def getTimerService():
+  def getTimerService(self):
     pass
 
 class AlarmTool(BaseTool):