diff --git a/service-t/src/com/android/server/ethernet/EthernetNetworkFactory.java b/service-t/src/com/android/server/ethernet/EthernetNetworkFactory.java
index 242fac8d8c..d17595ac9f 100644
--- a/service-t/src/com/android/server/ethernet/EthernetNetworkFactory.java
+++ b/service-t/src/com/android/server/ethernet/EthernetNetworkFactory.java
@@ -23,6 +23,7 @@ import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.content.Context;
 import android.net.ConnectivityManager;
+import android.net.EthernetNetworkSpecifier;
 import android.net.IpConfiguration;
 import android.net.IpConfiguration.IpAssignment;
 import android.net.IpConfiguration.ProxySettings;
@@ -33,7 +34,6 @@ import android.net.NetworkCapabilities;
 import android.net.NetworkFactory;
 import android.net.NetworkRequest;
 import android.net.NetworkSpecifier;
-import android.net.StringNetworkSpecifier;
 import android.net.ip.IIpClient;
 import android.net.ip.IpClientCallbacks;
 import android.net.ip.IpClientUtil;
@@ -215,8 +215,9 @@ public class EthernetNetworkFactory extends NetworkFactory {
         String requestedIface = null;
 
         NetworkSpecifier specifier = request.getNetworkSpecifier();
-        if (specifier instanceof StringNetworkSpecifier) {
-            requestedIface = ((StringNetworkSpecifier) specifier).specifier;
+        if (specifier instanceof EthernetNetworkSpecifier) {
+            requestedIface = ((EthernetNetworkSpecifier) specifier)
+                .getInterfaceName();
         }
 
         NetworkInterfaceState network = null;