diff --git a/packages/astro/src/core/build/static-build.ts b/packages/astro/src/core/build/static-build.ts
index a2cbe982a1..16ea049c1f 100644
--- a/packages/astro/src/core/build/static-build.ts
+++ b/packages/astro/src/core/build/static-build.ts
@@ -142,7 +142,7 @@ async function ssrBuild(opts: StaticBuildOptions, internals: BuildInternals, inp
 					entryFileNames: opts.buildConfig.serverEntry,
 					chunkFileNames: 'chunks/chunk.[hash].mjs',
 					assetFileNames: 'assets/asset.[hash][extname]',
-					...viteConfig.build?.rollupOptions?.output
+					...viteConfig.build?.rollupOptions?.output,
 				},
 			},
 			ssr: true,
@@ -223,7 +223,7 @@ async function clientBuild(
 					entryFileNames: 'entry.[hash].js',
 					chunkFileNames: 'chunks/chunk.[hash].js',
 					assetFileNames: 'assets/asset.[hash][extname]',
-					...viteConfig.build?.rollupOptions?.output
+					...viteConfig.build?.rollupOptions?.output,
 				},
 				preserveEntrySignatures: 'exports-only',
 			},