diff --git a/Jakefile.js b/Jakefile.js
index 1d6984a1782..9b95744d392 100644
--- a/Jakefile.js
+++ b/Jakefile.js
@@ -145,7 +145,6 @@ var harnessSources = [
 var librarySourceMap = [
         { target: "lib.core.d.ts", sources: ["core.d.ts"] },
         { target: "lib.dom.d.ts", sources: ["importcore.d.ts", "extensions.d.ts", "intl.d.ts", "dom.generated.d.ts"], },
-        { target: "lib.dom.es6.d.ts", sources: ["importcore.d.ts", "es6.d.ts", "intl.d.ts", "dom.generated.d.ts", "dom.es6.d.ts"] },
         { target: "lib.webworker.d.ts", sources: ["importcore.d.ts", "extensions.d.ts", "intl.d.ts", "webworker.generated.d.ts"], },
         { target: "lib.scriptHost.d.ts", sources: ["importcore.d.ts", "scriptHost.d.ts"], },
         { target: "lib.d.ts", sources: ["core.d.ts", "extensions.d.ts", "intl.d.ts", "dom.generated.d.ts", "webworker.importscripts.d.ts", "scriptHost.d.ts"], },