diff --git a/uni_modules/uni-wifi/utssdk/app-ios/index.uts b/uni_modules/uni-wifi/utssdk/app-ios/index.uts
index 3d0712efe1d63642d8607f8138e7c8ed9a25082d..109d98f6dbd5c97a8079c099d0574a5df2d385f0 100644
--- a/uni_modules/uni-wifi/utssdk/app-ios/index.uts
+++ b/uni_modules/uni-wifi/utssdk/app-ios/index.uts
@@ -133,7 +133,7 @@ function fetchConnectedWifiWithLocationPromise(option: GetConnectedWifiOptions)
 	
 	if (arr != null) {
 		let list = arr! as NSArray
-		let index = 0
+		let index: Int = 0
 		while (index < list.count) { 
 			let item = list[index]
 			let interfaceName = item as string