diff --git a/media/mtp/MtpFfsHandle.h b/media/mtp/MtpFfsHandle.h
index 2f90bd1..2347000 100644
--- a/media/mtp/MtpFfsHandle.h
+++ b/media/mtp/MtpFfsHandle.h
@@ -42,11 +42,14 @@
 };
 
 template <class T> class MtpFfsHandleTest;
+template <class T> class MtpFfsHandleTest_testControl_Test;
 
 class MtpFfsHandle : public IMtpHandle {
-    template <class T> friend class android::MtpFfsHandleTest;
+    template <class T> friend class MtpFfsHandleTest;
+    template <class T> friend class MtpFfsHandleTest_testControl_Test;
 protected:
     bool initFunctionfs();
+    bool writeDescriptors();
     void closeConfig();
     void closeEndpoints();
     void advise(int fd);