diff --git a/uni_modules/uni-wifi/utssdk/app-ios/index.uts b/uni_modules/uni-wifi/utssdk/app-ios/index.uts
index a3516a9d35b1a955c411e9b5ad71647224aa6378..a2ccfe4e1427ea14500bc41a2a1c0b0b1502e9be 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