diff --git a/libs/storage/IMountService.cpp b/libs/storage/IMountService.cpp
index 3ad9319..f36e2a3 100644
--- a/libs/storage/IMountService.cpp
+++ b/libs/storage/IMountService.cpp
@@ -430,13 +430,14 @@
     }
 
     void mountObb(const String16& filename, const String16& key,
-            const sp<IObbActionListener>& token)
+            const sp<IObbActionListener>& token, int32_t nonce)
     {
         Parcel data, reply;
         data.writeInterfaceToken(IMountService::getInterfaceDescriptor());
         data.writeString16(filename);
         data.writeString16(key);
         data.writeStrongBinder(token->asBinder());
+        data.writeInt32(nonce);
         if (remote()->transact(TRANSACTION_mountObb, data, &reply) != NO_ERROR) {
             LOGD("mountObb could not contact remote\n");
             return;
@@ -448,7 +449,7 @@
         }
     }
 
-    void unmountObb(const String16& filename, const bool force, const sp<IObbActionListener>& token)
+    void unmountObb(const String16& filename, const bool force)
     {
         Parcel data, reply;
         data.writeInterfaceToken(IMountService::getInterfaceDescriptor());
diff --git a/libs/storage/IObbActionListener.cpp b/libs/storage/IObbActionListener.cpp
index 5bfece7..eaa211e 100644
--- a/libs/storage/IObbActionListener.cpp
+++ b/libs/storage/IObbActionListener.cpp
@@ -30,7 +30,7 @@
         : BpInterface<IObbActionListener>(impl)
     { }
 
-    virtual void onObbResult(const String16& filename, const String16& status) { }
+    virtual void onObbResult(const String16& filename, const int32_t nonce, const int32_t state) { }
 };
 
 IMPLEMENT_META_INTERFACE(ObbActionListener, "IObbActionListener");
@@ -44,8 +44,9 @@
         case TRANSACTION_onObbResult: {
             CHECK_INTERFACE(IObbActionListener, data, reply);
             String16 filename = data.readString16();
-            String16 state = data.readString16();
-            onObbResult(filename, state);
+            int32_t nonce = data.readInt32();
+            int32_t state = data.readInt32();
+            onObbResult(filename, nonce, state);
             reply->writeNoException();
             return NO_ERROR;
         } break;