diff --git a/src/index.ts b/src/index.ts
index 9c5394d5..d732264e 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -345,7 +345,7 @@ const typescript: PluginImpl<RPT2Options> = (options) =>
 
 				let fileName = entry.name;
 				if (fileName.includes("?")) // HACK for rollup-plugin-vue, it creates virtual modules in form 'file.vue?rollup-plugin-vue=script.ts'
-					fileName = fileName.split(".vue?", 1) + extension;
+					fileName = fileName.split("?", 1) + extension;
 
 				// If 'useTsconfigDeclarationDir' is in plugin options, directly write to 'declarationDir'.
 				// This may not be under Rollup's output directory, and thus can't be emitted as an asset.