diff --git a/build/lib/bundle.js b/build/lib/bundle.js
index 89c5b9b50bd..d7e142e5e36 100644
--- a/build/lib/bundle.js
+++ b/build/lib/bundle.js
@@ -217,6 +217,7 @@ function removeDuplicateTSBoilerplate(destFiles) {
         { start: /^var __metadata/, end: /^};$/ },
         { start: /^var __param/, end: /^};$/ },
         { start: /^var __awaiter/, end: /^};$/ },
+        { start: /^var __generator/, end: /^};$/ },
     ];
     destFiles.forEach(function (destFile) {
         var SEEN_BOILERPLATE = [];
diff --git a/build/lib/bundle.ts b/build/lib/bundle.ts
index fd17d817fd5..da38acec4f4 100644
--- a/build/lib/bundle.ts
+++ b/build/lib/bundle.ts
@@ -339,6 +339,7 @@ function removeDuplicateTSBoilerplate(destFiles: IConcatFile[]): IConcatFile[] {
 		{ start: /^var __metadata/, end: /^};$/ },
 		{ start: /^var __param/, end: /^};$/ },
 		{ start: /^var __awaiter/, end: /^};$/ },
+		{ start: /^var __generator/, end: /^};$/ },
 	];
 
 	destFiles.forEach((destFile) => {