diff --git a/awx/main/fields.py b/awx/main/fields.py
index c1470b3dbe..852ea863eb 100644
--- a/awx/main/fields.py
+++ b/awx/main/fields.py
@@ -733,6 +733,11 @@ class CredentialTypeInjectorField(JSONSchemaField):
             (field, 'EXAMPLE')
             for field in model_instance.defined_fields
         )
+
+        class TowerNamespace:
+            filename = None
+
+        valid_namespace['tower'] = TowerNamespace()
         for type_, injector in value.items():
             for key, tmpl in injector.items():
                 try: