diff --git a/src/Umbraco.Web.UI.Client/src/libs/extension-api/controller/extensions-element-initializer.controller.ts b/src/Umbraco.Web.UI.Client/src/libs/extension-api/controller/extensions-element-initializer.controller.ts
index d715be00b8..4be1d76664 100644
--- a/src/Umbraco.Web.UI.Client/src/libs/extension-api/controller/extensions-element-initializer.controller.ts
+++ b/src/Umbraco.Web.UI.Client/src/libs/extension-api/controller/extensions-element-initializer.controller.ts
@@ -11,8 +11,8 @@ import type { UmbControllerHost } from '@umbraco-cms/backoffice/controller-api';
 /**
  */
 export class UmbExtensionsElementInitializer<
-	ManifestTypes extends ManifestBase,
-	ManifestTypeName extends string = ManifestTypes['type'],
+	ManifestTypes extends ManifestBase = ManifestBase,
+	ManifestTypeName extends string = string,
 	ManifestType extends ManifestBase = SpecificManifestTypeOrManifestBase<ManifestTypes, ManifestTypeName>,
 	ControllerType extends UmbExtensionElementInitializer<ManifestType> = UmbExtensionElementInitializer<ManifestType>,
 	MyPermittedControllerType extends ControllerType = PermittedControllerType<ControllerType>,
diff --git a/src/Umbraco.Web.UI.Client/src/libs/extension-api/types/map.types.ts b/src/Umbraco.Web.UI.Client/src/libs/extension-api/types/map.types.ts
index 9d7ebef3e0..255621e28f 100644
--- a/src/Umbraco.Web.UI.Client/src/libs/extension-api/types/map.types.ts
+++ b/src/Umbraco.Web.UI.Client/src/libs/extension-api/types/map.types.ts
@@ -1,6 +1,6 @@
 import type { ManifestBase } from './manifest-base.interface.js';
 
-export type ManifestTypeMap<ManifestTypes extends ManifestBase> = {
+type ManifestTypeMapGenerator<ManifestTypes extends ManifestBase> = {
 	[Manifest in ManifestTypes as Manifest['type']]: Manifest;
 } & {
 	[key: string]: ManifestBase;
@@ -9,4 +9,5 @@ export type ManifestTypeMap<ManifestTypes extends ManifestBase> = {
 export type SpecificManifestTypeOrManifestBase<
 	ManifestTypes extends ManifestBase,
 	T extends string,
-> = T extends keyof ManifestTypeMap<ManifestTypes> ? ManifestTypeMap<ManifestTypes>[T] : ManifestBase;
+	ManifestTypeMapType = ManifestTypeMapGenerator<ManifestTypes>,
+> = T extends keyof ManifestTypeMapType ? ManifestTypeMapType[T] : ManifestBase;