diff --git a/src/vs/code/browser/workbench/workbench-web-dev.html b/src/vs/code/browser/workbench/workbench-web-dev.html
index 870804cf455..738734778b6 100644
--- a/src/vs/code/browser/workbench/workbench-web-dev.html
+++ b/src/vs/code/browser/workbench/workbench-web-dev.html
@@ -18,6 +18,9 @@
 	<!-- Workbench Auth Session -->
 	<meta id="vscode-workbench-auth-session" data-settings="{{WORKBENCH_AUTH_SESSION}}">
 
+	<!-- Builtin Extensions (running out of sources) -->
+	<meta id="vscode-workbench-builtin-extensions" data-settings="{{WORKBENCH_BUILTIN_EXTENSIONS}}">
+
 	<!-- Workbench Icon/Manifest/CSS -->
 	<link rel="icon" href="{{WORKBENCH_WEB_BASE_URL}}/favicon.ico" type="image/x-icon" />
 	<link rel="manifest" href="{{WORKBENCH_WEB_BASE_URL}}/manifest.json">