diff --git a/include/freerdp/codec/audio.h b/include/freerdp/codec/audio.h
index 80261bf3e..752bf17bd 100644
--- a/include/freerdp/codec/audio.h
+++ b/include/freerdp/codec/audio.h
@@ -192,6 +192,8 @@ extern "C"
 #endif /* !WAVE_FORMAT_LUCENT_G723 */
 #define WAVE_FORMAT_AAC_MS 0xA106
 
+#define WAVE_FORMAT_OPUS 0x704F
+
 #define WAVE_FORMAT_EXTENSIBLE 0xFFFE
 
 	/**