diff --git a/shared/domain/activityField/bindPhoneField.ts b/shared/domain/activityField/bindPhoneField.ts
index 617faed58..0e080fce0 100644
--- a/shared/domain/activityField/bindPhoneField.ts
+++ b/shared/domain/activityField/bindPhoneField.ts
@@ -131,13 +131,13 @@ export class BindPhoneData extends ActivityBase {
         for(let link of links) {
             switch (link.type) {
                 case SNS_LINK_TYPE.WX_GROUP: {
-                    this.wxGroup.setLink(link); break;
+                    this.wxGroup?.setLink(link); break;
                 }
                 case SNS_LINK_TYPE.WX_PUBLIC_ACCOUNT: {
-                    this.wxPublicAccount.setLink(link); break;
+                    this.wxPublicAccount?.setLink(link); break;
                 }
                 case SNS_LINK_TYPE.BBS: {
-                    this.bbs.setLink(link); break;
+                    this.bbs?.setLink(link); break;
                 }
             }
         }