diff --git a/apps/playback.h b/apps/playback.h
index 0b78eb3bcb..748a4fe871 100644
--- a/apps/playback.h
+++ b/apps/playback.h
@@ -26,9 +26,6 @@
 #include "mp3data.h"
 #include "events.h"
 
-#define CODEC_IDX_AUDIO     0
-#define CODEC_IDX_VOICE     1
-
 /* Not yet implemented. */
 #define CODEC_SET_AUDIOBUF_WATERMARK    4