diff --git a/vite.config.ts b/vite.config.ts
index 6c0f874..55e26c6 100644
--- a/vite.config.ts
+++ b/vite.config.ts
@@ -47,7 +47,7 @@ export default defineConfig(({ command }) => {
           },
           vite: {
             build: {
-              sourcemap,
+              sourcemap: sourcemap ? 'inline' : undefined, // #332
               minify: isBuild,
               outDir: 'dist-electron/preload',
               rollupOptions: {