diff --git a/aio/tools/examples/shared/boilerplate/cli/src/environments/environment.ts b/aio/tools/examples/shared/boilerplate/cli/src/environments/environment.ts
index 012182efa3..bed42878cd 100644
--- a/aio/tools/examples/shared/boilerplate/cli/src/environments/environment.ts
+++ b/aio/tools/examples/shared/boilerplate/cli/src/environments/environment.ts
@@ -1,5 +1,5 @@
 // This file can be replaced during build by using the `fileReplacements` array.
-// `ng build ---prod` replaces `environment.ts` with `environment.prod.ts`.
+// `ng build --prod` replaces `environment.ts` with `environment.prod.ts`.
 // The list of file replacements can be found in `angular.json`.
 
 export const environment = {