diff --git a/packages/vite/src/node/server/index.ts b/packages/vite/src/node/server/index.ts
index ca3790c8060cc1..b17180c81d5e64 100644
--- a/packages/vite/src/node/server/index.ts
+++ b/packages/vite/src/node/server/index.ts
@@ -210,6 +210,7 @@ export interface ViteDevServer {
   ): Promise<ESBuildTransformResult>
   /**
    * Transform module code into SSR format.
+   * @experimental
    */
   ssrTransform(
     code: string,