diff --git a/packages/schematics/angular/guard/schema.json b/packages/schematics/angular/guard/schema.json
index d2df59cb0446..f6a4676a400a 100644
--- a/packages/schematics/angular/guard/schema.json
+++ b/packages/schematics/angular/guard/schema.json
@@ -47,6 +47,7 @@
       "default": false
     },
     "implements": {
+      "alias": "guardType",
       "type": "array",
       "description": "Specifies which type of guard to create.",
       "uniqueItems": true,