diff --git a/src/shared/dom.js b/src/shared/dom.js
index 65c38061ff..ffbda89b6d 100644
--- a/src/shared/dom.js
+++ b/src/shared/dom.js
@@ -104,7 +104,7 @@ export function toNumber(value) {
 
 export function timeRangesToArray(ranges) {
 	var array = [];
-	for (let i = 0; i < ranges.length; i += 1) {
+	for (var i = 0; i < ranges.length; i += 1) {
 		array.push({ start: ranges.start(i), end: ranges.end(i) });
 	}
 	return array;
diff --git a/test/js/samples/media-bindings/expected-bundle.js b/test/js/samples/media-bindings/expected-bundle.js
index 631999398c..980c134d90 100644
--- a/test/js/samples/media-bindings/expected-bundle.js
+++ b/test/js/samples/media-bindings/expected-bundle.js
@@ -35,7 +35,7 @@ function removeListener(node, event, handler) {
 
 function timeRangesToArray(ranges) {
 	var array = [];
-	for (let i = 0; i < ranges.length; i += 1) {
+	for (var i = 0; i < ranges.length; i += 1) {
 		array.push({ start: ranges.start(i), end: ranges.end(i) });
 	}
 	return array;