diff --git a/src/core/helpers/promise.js b/src/core/helpers/promise.js
index 368bed23215cb1dcad82aa72dd54af5a76208f2a..59f1087f563eeac8dfa198a79977d121e6a02a57 100644
--- a/src/core/helpers/promise.js
+++ b/src/core/helpers/promise.js
@@ -55,9 +55,9 @@ export function promisify (name, api) {
       api(Object.assign({}, options, {
         success: resolve,
         fail: reject
-      }), ...params)
-      if (!Promise.prototype.finally) {
-        /* eslint-disable no-extend-native */
+      }), ...params)
+      /* eslint-disable no-extend-native */
+      try {
         Promise.prototype.finally = function (callback) {
           const promise = this.constructor
           return this.then(
@@ -67,7 +67,7 @@ export function promisify (name, api) {
             })
           )
         }
-      }
+      } catch (e) {}
     }))
   }
 }