diff --git a/src/components/keyboard/index.js b/src/components/keyboard/index.js
index 556dd4e7ea201183bf16a9f0a43e42eb69879b7a..fd608773fd0e67592c6c042e7847cc2cf875d257 100644
--- a/src/components/keyboard/index.js
+++ b/src/components/keyboard/index.js
@@ -28,8 +28,10 @@ export default class Keyboard extends React.Component {
     }, true);
 
     // 阻止双指放大
-    document.addEventListener('gesturestart', (event) => {
-      event.preventDefault();
+    document.addEventListener('gesturestart', (e) => {
+      if (e.preventDefault) {
+        event.preventDefault();
+      }
     });
 
     document.addEventListener('mousedown', (e) => {