diff --git a/include/nuttx/audio/audio.h b/include/nuttx/audio/audio.h
index 7aba3dc3161..d6783dbb6cd 100644
--- a/include/nuttx/audio/audio.h
+++ b/include/nuttx/audio/audio.h
@@ -185,6 +185,8 @@
 #define AUDIO_SUBFMT_MIDI_0         0x10
 #define AUDIO_SUBFMT_MIDI_1         0x11
 #define AUDIO_SUBFMT_MIDI_2         0x12
+#define AUDIO_SUBFMT_AMRNB          0x13
+#define AUDIO_SUBFMT_AMRWB          0x14
 
 /* Audio Hardware-Format Types **********************************************/