diff --git a/src/core/ctx.ts b/src/core/ctx.ts
index a80b93c..da8e9c8 100644
--- a/src/core/ctx.ts
+++ b/src/core/ctx.ts
@@ -129,7 +129,7 @@ export function createContext(options: Options = {}, root = process.cwd()) {
 
     return {
       code: s.toString(),
-      map: s.generateMap(),
+      map: s.generateMap({ source: id, includeContent: true }),
     }
   }