diff --git a/src/vs/server/webClientServer.ts b/src/vs/server/webClientServer.ts
index 9c0f0e1cf8f98..d9e41798aa26e 100644
--- a/src/vs/server/webClientServer.ts
+++ b/src/vs/server/webClientServer.ts
@@ -320,7 +320,7 @@ export class WebClientServer {
 					// Endpoints
 					base,
 					logoutEndpointUrl: base + '/logout',
-					proxyEndpointUrlTemplate: base + '/proxy/{{port}}',
+					proxyEndpointUrlTemplate: base + '/proxy/{port}',
 					webEndpointUrl: vscodeBase + '/static',
 					webEndpointUrlTemplate: vscodeBase + '/static',
 					webviewContentExternalBaseUrlTemplate: vscodeBase + '/webview/{{uuid}}/',