diff --git a/src/@fuse/lib/mock-api/mock-api.module.ts b/src/@fuse/lib/mock-api/mock-api.module.ts
index bbb91251..1450a66a 100644
--- a/src/@fuse/lib/mock-api/mock-api.module.ts
+++ b/src/@fuse/lib/mock-api/mock-api.module.ts
@@ -29,7 +29,7 @@ export class FuseMockApiModule
                 {
                     provide   : APP_INITIALIZER,
                     deps      : [...mockApiServices],
-                    useFactory: () => () => null,
+                    useFactory: () => (): any => null,
                     multi     : true
                 },
                 {