diff --git a/uni_modules/uni-wifi/utssdk/app-ios/index.uts b/uni_modules/uni-wifi/utssdk/app-ios/index.uts
index 27f23ba64a84aa9fc9d040a68b04d55a29a3b858..b1e94f3ea97acd22a10b6e23bd417a007c54c579 100644
--- a/uni_modules/uni-wifi/utssdk/app-ios/index.uts
+++ b/uni_modules/uni-wifi/utssdk/app-ios/index.uts
@@ -80,7 +80,7 @@ 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