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) {
diff --git a/media/libmedia/include/media/MidiIoWrapper.h b/media/libmedia/include/media/MidiIoWrapper.h
index b19d49e..d29949e 100644
--- a/media/libmedia/include/media/MidiIoWrapper.h
+++ b/media/libmedia/include/media/MidiIoWrapper.h
@@ -24,7 +24,6 @@
 namespace android {
 
 struct CDataSource;
-class DataSourceUnwrapper;
 
 class MidiIoWrapper {
 public:
@@ -43,6 +42,7 @@
     int mFd;
     off64_t mBase;
     int64_t  mLength;
+    class DataSourceUnwrapper;
     DataSourceUnwrapper *mDataSource;
     EAS_FILE mEasFile;
 };