diff --git a/lib/galaxy/jobs/__init__.py b/lib/galaxy/jobs/__init__.py
index d38a43319c68..837ba2b3c6ba 100644
--- a/lib/galaxy/jobs/__init__.py
+++ b/lib/galaxy/jobs/__init__.py
@@ -2518,7 +2518,7 @@ def user_system_pwent(self):
         if self.__user_system_pwent is None:
             job = self.get_job()
             self.__user_system_pwent = job.user.system_user_pwent(
-                self.get_destination_configuration("real_system_username", None)
+                self.get_destination_configuration("real_system_username", self.app.config.real_system_username)
             )
         return self.__user_system_pwent