diff --git a/location/lpfence/mntn/v1_0/IMntnCallback.idl b/location/lpfence/mntn/v1_0/IMntnCallback.idl
index 82755ca88bfdb2a1fdaec5b42962057d8133739d..1fa4804f79e30894c28bee2c41e9b27c4248024d 100644
--- a/location/lpfence/mntn/v1_0/IMntnCallback.idl
+++ b/location/lpfence/mntn/v1_0/IMntnCallback.idl
@@ -67,6 +67,6 @@ import ohos.hdi.location.lpfence.mntn.v1_0.MntnTypes;
      *
      @since 6.0
      */
-    OnLpfenceMntnRequestCb([in] string[] mntnInfo);
+    OnLpfenceMntnRequestCb([in] String[] mntnInfo);
 }
 /** @} */