diff --git a/media/libmedia/MidiIoWrapper.cpp b/media/libmedia/MidiIoWrapper.cpp
index 6d46363..e71ea2c 100644
--- a/media/libmedia/MidiIoWrapper.cpp
+++ b/media/libmedia/MidiIoWrapper.cpp
@@ -49,7 +49,7 @@
     mDataSource = nullptr;
 }
 
-class DataSourceUnwrapper {
+class MidiIoWrapper::DataSourceUnwrapper {
 
 public:
     explicit DataSourceUnwrapper(CDataSource *csource) {