diff --git a/src/role-helpers.js b/src/role-helpers.js
index eee0010a..6595c921 100644
--- a/src/role-helpers.js
+++ b/src/role-helpers.js
@@ -149,8 +149,10 @@ function getRoles(container, {hidden = false} = {}) {
 function prettyRoles(dom, {hidden}) {
   const roles = getRoles(dom, {hidden})
 
-  return Object.entries(roles)
-    .map(([role, elements]) => {
+  // Object.entries is not supported in older browsers
+  return Object.keys(roles)
+    .map(role => {
+      const elements = roles[role]
       const delimiterBar = '-'.repeat(50)
       const elementsString = elements
         .map(el => {