diff --git a/packages/vite/src/node/utils.ts b/packages/vite/src/node/utils.ts
index 582a3c2c6e43ef..c3cf7f853a29e9 100644
--- a/packages/vite/src/node/utils.ts
+++ b/packages/vite/src/node/utils.ts
@@ -1093,7 +1093,7 @@ function deepClone<T>(value: T): DeepWritable<T> {
     return value as DeepWritable<T>
   }
   if (value instanceof RegExp) {
-    return structuredClone(value) as DeepWritable<T>
+    return new RegExp(value) as DeepWritable<T>
   }
   if (typeof value === 'object' && value != null) {
     throw new Error('Cannot deep clone non-plain object')