diff --git a/src/index.ts b/src/index.ts
index ebbf440..b024580 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -32,12 +32,14 @@ function buildOptions(context: PresetContext) {
     throw new Error("vite options missing!");
   }
 
+  const define = opts.define;
   const build = opts.build;
   const resolve = opts.resolve;
   const optimize = opts.optimize;
   const polyfill = opts.polyfill;
 
   return {
+    viteDefine: resolveDirective(define, context).stringifiedConfig,
     viteBuild: resolveDirective(build, context).stringifiedConfig,
     viteResolve: resolveDirective(resolve, context).stringifiedConfig,
     viteOptimize: resolveDirective(optimize, context).stringifiedConfig,
diff --git a/templates/vite.config.js b/templates/vite.config.js
index fecbc96..474d1bb 100644
--- a/templates/vite.config.js
+++ b/templates/vite.config.js
@@ -2,6 +2,7 @@ import { defineConfig } from "vite";
 import optimizer from "vite-plugin-optimizer";
 import { nodePolyfills } from "vite-plugin-node-polyfills";
 export default defineConfig({
+  define: {viteDefine},
   build: {viteBuild},
   resolve: {viteResolve},
   plugins: [