diff --git a/audio/2.0/IStreamOutCallback.hal b/audio/2.0/IStreamOutCallback.hal
index 267c46d..cdb38de 100644
--- a/audio/2.0/IStreamOutCallback.hal
+++ b/audio/2.0/IStreamOutCallback.hal
@@ -23,15 +23,15 @@
     /*
      * Non blocking write completed.
      */
-    onWriteReady();
+    oneway onWriteReady();
 
     /*
      * Drain completed.
      */
-    onDrainReady();
+    oneway onDrainReady();
 
     /*
      * Stream hit an error.
      */
-    onError();
+    oneway onError();
 };
diff --git a/audio/2.0/default/StreamOut.cpp b/audio/2.0/default/StreamOut.cpp
index 913b6ae..805734b 100644
--- a/audio/2.0/default/StreamOut.cpp
+++ b/audio/2.0/default/StreamOut.cpp
@@ -15,6 +15,7 @@
  */
 
 #define LOG_TAG "StreamOutHAL"
+//#define LOG_NDEBUG 0
 
 #include <hardware/audio.h>
 #include <android/log.h>