diff --git a/packages/vite/src/node/utils.ts b/packages/vite/src/node/utils.ts
index 502f2078cefd5c..e2c7c8862b930a 100644
--- a/packages/vite/src/node/utils.ts
+++ b/packages/vite/src/node/utils.ts
@@ -1039,9 +1039,10 @@ export function transformStableResult(
 ): TransformResult {
   return {
     code: s.toString(),
-    map: config.build.sourcemap
-      ? s.generateMap({ hires: true, source: id })
-      : null
+    map:
+      config.command === 'build' && config.build.sourcemap
+        ? s.generateMap({ hires: true, source: id })
+        : null
   }
 }