diff --git a/media/ndk/NdkMediaDataSource.cpp b/media/ndk/NdkMediaDataSource.cpp
index 9ea734b..706111d 100644
--- a/media/ndk/NdkMediaDataSource.cpp
+++ b/media/ndk/NdkMediaDataSource.cpp
@@ -235,5 +235,10 @@
     mSource->close = close;
 }
 
+EXPORT
+void AMediaDataSource_close(AMediaDataSource *mSource) {
+    return mSource->close(mSource->userdata);
+}
+
 } // extern "C"