diff --git a/src/rollup/index.ts b/src/rollup/index.ts
index a24e1662069..e0480cc68fc 100644
--- a/src/rollup/index.ts
+++ b/src/rollup/index.ts
@@ -353,7 +353,7 @@ function getSortingFileType(file: OutputAsset | OutputChunk): SortingFileType {
 
 function createOutput(outputBundle: Record<string, OutputChunk | OutputAsset>): RollupOutput {
 	return {
-		output: Object.keys(outputBundle)
+		output: <[OutputChunk, ...(OutputChunk | OutputAsset)[]]>Object.keys(outputBundle)
 			.map(fileName => outputBundle[fileName])
 			.sort((outputFileA, outputFileB) => {
 				const fileTypeA = getSortingFileType(outputFileA);