diff --git a/packages/backend-plugin-api/api-report.md b/packages/backend-plugin-api/api-report.md
index df8474d670..44791f5744 100644
--- a/packages/backend-plugin-api/api-report.md
+++ b/packages/backend-plugin-api/api-report.md
@@ -83,12 +83,16 @@ export const configServiceRef: ServiceRef<Config>;
 // @public (undocumented)
 export function createBackendModule<TOptions>(
   config: BackendModuleConfig<TOptions>,
-): (option: TOptions) => BackendRegistrable;
+): undefined extends TOptions
+  ? (options?: TOptions) => BackendRegistrable
+  : (options: TOptions) => BackendRegistrable;
 
 // @public (undocumented)
 export function createBackendPlugin<TOptions>(
   config: BackendPluginConfig<TOptions>,
-): (option: TOptions) => BackendRegistrable;
+): undefined extends TOptions
+  ? (options?: TOptions) => BackendRegistrable
+  : (options: TOptions) => BackendRegistrable;
 
 // @public (undocumented)
 export function createExtensionPoint<T>(options: {
diff --git a/plugins/catalog-backend/api-report.md b/plugins/catalog-backend/api-report.md
index 22a7f8192c..fa6806933d 100644
--- a/plugins/catalog-backend/api-report.md
+++ b/plugins/catalog-backend/api-report.md
@@ -224,7 +224,7 @@ export type CatalogPermissionRule<TParams extends unknown[] = unknown[]> =
   PermissionRule<Entity, EntitiesSearchFilter, 'catalog-entity', TParams>;
 
 // @alpha
-export const catalogPlugin: (option: unknown) => BackendRegistrable;
+export const catalogPlugin: (options?: unknown) => BackendRegistrable;
 
 // @public (undocumented)
 export interface CatalogProcessingEngine {
diff --git a/plugins/scaffolder-backend/api-report.md b/plugins/scaffolder-backend/api-report.md
index 7c24bdc572..6e7220964d 100644
--- a/plugins/scaffolder-backend/api-report.md
+++ b/plugins/scaffolder-backend/api-report.md
@@ -566,7 +566,7 @@ export type RunCommandOptions = {
 };
 
 // @alpha
-export const scaffolderCatalogModule: (option: unknown) => BackendRegistrable;
+export const scaffolderCatalogModule: (options?: unknown) => BackendRegistrable;
 
 // @public (undocumented)
 export class ScaffolderEntitiesProcessor implements CatalogProcessor {