diff --git a/src/core/helpers/promise.js b/src/core/helpers/promise.js
index 59f1087f563eeac8dfa198a79977d121e6a02a57..f237401716314169a5774693c26ecd0e50d5a9e0 100644
--- a/src/core/helpers/promise.js
+++ b/src/core/helpers/promise.js
@@ -57,7 +57,7 @@ export function promisify (name, api) {
         fail: reject
       }), ...params)
       /* eslint-disable no-extend-native */
-      try {
+      if (!Promise.prototype.finally) {
         Promise.prototype.finally = function (callback) {
           const promise = this.constructor
           return this.then(
@@ -67,7 +67,7 @@ export function promisify (name, api) {
             })
           )
         }
-      } catch (e) {}
+      }
     }))
   }
 }