diff --git a/product/ERP5Type/Interactor.py b/product/ERP5Type/Interactor.py
index fe93945e678852f1413ae0c1b831b6723e5c0b75..89867e489742a7e9e4671ed070360f2ae7d9b2e5 100644
--- a/product/ERP5Type/Interactor.py
+++ b/product/ERP5Type/Interactor.py
@@ -197,7 +197,7 @@ class InteractorOfInteractor(Interactor):
     self.interactor = interactor
 
   def install(self):
-    self.on(interactor.doSomething).doAfter(self.doSomething)
+    self.on(Interactor.doSomething).doAfter(self.doSomething)
 
   def doSomething(self, method_call_object):
     pass