diff --git a/Tethering/src/android/net/dhcp/DhcpServerCallbacks.java b/Tethering/src/android/net/dhcp/DhcpServerCallbacks.java
index 7c41377985..9fda1257b4 100644
--- a/Tethering/src/android/net/dhcp/DhcpServerCallbacks.java
+++ b/Tethering/src/android/net/dhcp/DhcpServerCallbacks.java
@@ -28,4 +28,9 @@ public abstract class DhcpServerCallbacks extends IDhcpServerCallbacks.Stub {
     public int getInterfaceVersion() {
         return IDhcpServerCallbacks.VERSION;
     }
+
+    @Override
+    public String getInterfaceHash() {
+        return IDhcpServerCallbacks.HASH;
+    }
 }
diff --git a/Tethering/src/android/net/ip/IpServer.java b/Tethering/src/android/net/ip/IpServer.java
index 190d250986..f39e7af43e 100644
--- a/Tethering/src/android/net/ip/IpServer.java
+++ b/Tethering/src/android/net/ip/IpServer.java
@@ -301,6 +301,11 @@ public class IpServer extends StateMachine {
         public int getInterfaceVersion() {
             return this.VERSION;
         }
+
+        @Override
+        public String getInterfaceHash() {
+            return this.HASH;
+        }
     }
 
     private class DhcpServerCallbacksImpl extends DhcpServerCallbacks {
diff --git a/Tethering/src/android/net/util/BaseNetdUnsolicitedEventListener.java b/Tethering/src/android/net/util/BaseNetdUnsolicitedEventListener.java
index 3218c0b387..b1ffdb01f5 100644
--- a/Tethering/src/android/net/util/BaseNetdUnsolicitedEventListener.java
+++ b/Tethering/src/android/net/util/BaseNetdUnsolicitedEventListener.java
@@ -67,4 +67,9 @@ public class BaseNetdUnsolicitedEventListener extends INetdUnsolicitedEventListe
     public int getInterfaceVersion() {
         return INetdUnsolicitedEventListener.VERSION;
     }
+
+    @Override
+    public String getInterfaceHash() {
+        return INetdUnsolicitedEventListener.HASH;
+    }
 }