diff --git a/core/java/android/net/vcn/IVcnUnderlyingNetworkPolicyListener.aidl b/core/java/android/net/vcn/IVcnUnderlyingNetworkPolicyListener.aidl
index f8ae492016f07..62de8216ce541 100644
--- a/core/java/android/net/vcn/IVcnUnderlyingNetworkPolicyListener.aidl
+++ b/core/java/android/net/vcn/IVcnUnderlyingNetworkPolicyListener.aidl
@@ -17,6 +17,6 @@
 package android.net.vcn;
 
 /** @hide */
-interface IVcnUnderlyingNetworkPolicyListener {
+oneway interface IVcnUnderlyingNetworkPolicyListener {
     void onPolicyChanged();
 }
\ No newline at end of file