diff --git a/externs.js b/externs.js
index 961c9d6e6c0..8da42a7128b 100644
--- a/externs.js
+++ b/externs.js
@@ -15,6 +15,7 @@ var WebAssembly = {};
 // WebXR
 var XRWebGLLayer = {};
 var XRRay = {};
+var XRHand = {};
 var DOMPoint = {};
 
 // extras requires this