diff --git a/media/mtp/MtpDebug.cpp b/media/mtp/MtpDebug.cpp
index 6d0273d..9ded6e2 100644
--- a/media/mtp/MtpDebug.cpp
+++ b/media/mtp/MtpDebug.cpp
@@ -16,6 +16,7 @@
 
 #include "MtpDebug.h"
 
+namespace android {
 
 struct OperationCodeEntry {
     const char* name;
@@ -71,3 +72,5 @@
     }
     return "*** UNKNOWN OPERATION ***";
 }
+
+}  // namespace android