diff --git a/src/common/appUpdate.js b/src/common/appUpdate.js
index 549ad662..cb5502bd 100644
--- a/src/common/appUpdate.js
+++ b/src/common/appUpdate.js
@@ -124,7 +124,7 @@ export function confirm(downUrl) {
 					showLoading.setTitle("已连接到服务器");
 					break;
 				case 3:
-					if (task.totalSize && > task.totalSize0) {
+					if (task.totalSize && task.totalSize > 0) {
 						prg = parseInt(
 							(parseFloat(task.downloadedSize) /
 								parseFloat(task.totalSize)) *