diff --git a/src/risotto/register.py b/src/risotto/register.py
index 672ea39..a4b3ad5 100644
--- a/src/risotto/register.py
+++ b/src/risotto/register.py
@@ -277,7 +277,7 @@ class RegisterDispatcher:
         try:
             self.injected_self[submodule_name] = module.Risotto(test)
         except AttributeError as err:
-            raise RegistrationError(_(f'unable to register the module {submodule_name}, this module must have Risotto class'))
+            print(_(f'unable to register the module {submodule_name}, this module must have Risotto class'))
 
     def validate(self):
         """ check if all messages have a function