diff --git a/packages/schema/src/config/app.ts b/packages/schema/src/config/app.ts
index 4bfc22184f..15d6897813 100644
--- a/packages/schema/src/config/app.ts
+++ b/packages/schema/src/config/app.ts
@@ -371,7 +371,7 @@ export default defineResolvers({
    * }
    * </style>
    * ```
-   * @type {string | boolean | undefined}
+   * @type {string | boolean | undefined | null}
    */
   spaLoadingTemplate: {
     $resolve: async (val, get) => {
@@ -381,7 +381,7 @@ export default defineResolvers({
       if (typeof val === 'boolean') {
         return val
       }
-      return undefined
+      return null
     },
   },
 
diff --git a/packages/schema/src/config/typescript.ts b/packages/schema/src/config/typescript.ts
index be6ccf3d42..3c98111e3d 100644
--- a/packages/schema/src/config/typescript.ts
+++ b/packages/schema/src/config/typescript.ts
@@ -20,7 +20,7 @@ export default defineResolvers({
      * builder environment types (with `false`) to handle this fully yourself, or opt for a 'shared' option.
      *
      * The 'shared' option is advised for module authors, who will want to support multiple possible builders.
-     * @type {'vite' | 'webpack' | 'rspack' | 'shared' | false | undefined}
+     * @type {'vite' | 'webpack' | 'rspack' | 'shared' | false | undefined | null}
      */
     builder: {
       $resolve: (val) => {
@@ -32,7 +32,7 @@ export default defineResolvers({
         if (val === false) {
           return false
         }
-        return undefined
+        return null
       },
     },