diff --git a/media/mtp/ptptest.cpp b/media/mtp/ptptest.cpp
index 1218fa6..3922b61 100644
--- a/media/mtp/ptptest.cpp
+++ b/media/mtp/ptptest.cpp
@@ -23,6 +23,8 @@
 
 #include "MtpClient.h"
 
+using namespace android;
+
 static struct usb_device *sCameraDevice = NULL;
 static int sCameraInterface = 0;
 static MtpClient *sClient = NULL;
@@ -131,4 +133,4 @@
     }
 
     return 0;
-}
\ No newline at end of file
+}