diff --git a/openwisp_controller/subnet_division/rule_types/base.py b/openwisp_controller/subnet_division/rule_types/base.py
index 70cb8966f..05de9b7cd 100644
--- a/openwisp_controller/subnet_division/rule_types/base.py
+++ b/openwisp_controller/subnet_division/rule_types/base.py
@@ -212,11 +212,11 @@ def create_subnets(config, division_rule, max_subnet, generated_indexes):
                     target=config.device,
                     action_object=master_subnet,
                     level='error',
-                    message=(
+                    message=_(
                         'Failed to provision subnets for'
                         ' [{notification.target}]({notification.target_link})'
                     ),
-                    description=(
+                    description=_(
                         'The [{notification.action_object}]({notification.action_link})'
                         ' subnet has run out of space.'
                     ),