diff --git a/media/ndk/NdkMediaCodec.cpp b/media/ndk/NdkMediaCodec.cpp
index bd2541f..2ac16c7 100644
--- a/media/ndk/NdkMediaCodec.cpp
+++ b/media/ndk/NdkMediaCodec.cpp
@@ -61,6 +61,8 @@
     virtual void onMessageReceived(const sp<AMessage> &msg);
 };
 
+typedef void (*OnCodecEvent)(AMediaCodec *codec, void *userdata);
+
 struct AMediaCodec {
     sp<android::MediaCodec> mCodec;
     sp<ALooper> mLooper;
@@ -347,7 +349,7 @@
     return translate_error(mData->mCodec->renderOutputBufferAndRelease(idx, timestampNs));
 }
 
-EXPORT
+//EXPORT
 media_status_t AMediaCodec_setNotificationCallback(AMediaCodec *mData, OnCodecEvent callback, void *userdata) {
     mData->mCallback = callback;
     mData->mCallbackUserData = userdata;