diff --git a/vite.config.ts b/vite.config.ts
index a1ea3c3..870aca8 100644
--- a/vite.config.ts
+++ b/vite.config.ts
@@ -45,6 +45,7 @@ export default defineConfig({
 
 function withDebug(config: UserConfig): UserConfig {
   if (process.env.VSCODE_DEBUG) {
+    if (!config.build) config.build = {}
     config.build.sourcemap = true
     config.plugins = (config.plugins || []).concat({
       name: 'electron-vite-debug',