diff --git a/lib/utils/gestures.js b/lib/utils/gestures.js
index 601409defa..3a87b953d1 100644
--- a/lib/utils/gestures.js
+++ b/lib/utils/gestures.js
@@ -125,7 +125,7 @@ function canBeLabelled(el) {
  * @return {!Array<!HTMLLabelElement>} Relevant label for `el`
  */
 function matchingLabels(el) {
-  let labels = [...(/** @type {HTMLInputElement} */((el).labels || []))];
+  let labels = Array.prototype.slice.call(/** @type {HTMLInputElement} */(el).labels);
   // IE doesn't have `labels` and Safari doesn't populate `labels`
   // if element is in a shadowroot.
   // In this instance, finding the non-ancestor labels is enough,