diff --git a/packages/vite/src/node/plugins/css.ts b/packages/vite/src/node/plugins/css.ts
index 4a0c5aa926becb..1e0684cf1df59b 100644
--- a/packages/vite/src/node/plugins/css.ts
+++ b/packages/vite/src/node/plugins/css.ts
@@ -219,8 +219,6 @@ export function resolveCSSOptions(
   if (resolved.transformer === 'lightningcss') {
     resolved.lightningcss ??= {}
     resolved.lightningcss.targets ??= convertTargets(ESBUILD_MODULES_TARGET)
-  } else {
-    resolved.lightningcss = undefined
   }
   return resolved
 }