diff --git a/media/mtp/MtpDebug.h b/media/mtp/MtpDebug.h
index bab79e9..289f5c7 100644
--- a/media/mtp/MtpDebug.h
+++ b/media/mtp/MtpDebug.h
@@ -19,9 +19,13 @@
 
 #include "mtp.h"
 
+namespace android {
+
 class MtpDebug {
 public:
     static const char* getOperationCodeName(MtpOperationCode code);
 };
 
+}; // namespace android
+
 #endif // _MTP_DEBUG_H