diff --git a/NEWS.rst b/NEWS.rst
index a4274b7055fa21013a89f3cb5bd824745c053220_TkVXUy5yc3Q=..48ec25e39dd8df9fae6e34a9689464dadf496142_TkVXUy5yc3Q= 100644
--- a/NEWS.rst
+++ b/NEWS.rst
@@ -1,6 +1,6 @@
 Changelog
 =========
 
-18.0.1.1.0
+18.0.1.0.1
 ----------
 
@@ -5,6 +5,5 @@
 ----------
 
-* Provides a way for other modules to define a message type.
 * Fix message body encoding and display.
 
 18.0.1.0.0
diff --git a/models/xbus_message.py b/models/xbus_message.py
index a4274b7055fa21013a89f3cb5bd824745c053220_bW9kZWxzL3hidXNfbWVzc2FnZS5weQ==..48ec25e39dd8df9fae6e34a9689464dadf496142_bW9kZWxzL3hidXNfbWVzc2FnZS5weQ== 100644
--- a/models/xbus_message.py
+++ b/models/xbus_message.py
@@ -46,7 +46,7 @@
     # is only used to display information
     uid = fields.Char(string="UID", readonly=True)
 
-    type = fields.Selection(selection="_get_type_selection", required=True)
+    type = fields.Selection([], required=True)
 
     header = fields.Binary(attachment=False)
 
@@ -88,12 +88,6 @@
                     return False
         return False
 
-    def _get_type_selection(self):
-        """Provides a list of message type selection values.
-        Should return a list of value-label tuples.
-        """
-        raise NotImplementedError
-
     link_ids = fields.One2many(
         comodel_name="xbus.message.link",
         string="Linked Records",
diff --git a/tests/models.py b/tests/models.py
index a4274b7055fa21013a89f3cb5bd824745c053220_dGVzdHMvbW9kZWxzLnB5..48ec25e39dd8df9fae6e34a9689464dadf496142_dGVzdHMvbW9kZWxzLnB5 100644
--- a/tests/models.py
+++ b/tests/models.py
@@ -17,7 +17,7 @@
 #    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #
 #############################################################################
-from odoo import models  # type: ignore[import-untyped]
+from odoo import fields, models  # type: ignore[import-untyped]
 
 
 class XbusMessage(models.Model):
@@ -26,7 +26,7 @@
 
     _inherit = "xbus.message"
 
-    def _get_type_selection(self):
-        return [
+    type = fields.Selection(
+        selection_add=[
             ("test_1", "Test Message Type 1"),
             ("test_2", "Test Message Type 2"),
@@ -31,3 +31,5 @@
             ("test_1", "Test Message Type 1"),
             ("test_2", "Test Message Type 2"),
-        ]
+        ],
+        ondelete={"test_1": "cascade", "test_2": "cascade"},
+    )