diff --git a/include/ksmedia.h b/include/ksmedia.h
index 402759644d0..44834bb52be 100644
--- a/include/ksmedia.h
+++ b/include/ksmedia.h
@@ -34,7 +34,9 @@ DEFINE_GUID(KSDATAFORMAT_SUBTYPE_ALAW, 0x00000006, 0x0000, 0x0010, 0x80, 0x00, 0
 #define KSAUDIO_SPEAKER_QUAD (SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | SPEAKER_BACK_LEFT | SPEAKER_BACK_RIGHT)
 #define KSAUDIO_SPEAKER_SURROUND (SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | SPEAKER_FRONT_CENTER | SPEAKER_BACK_CENTER)
 #define KSAUDIO_SPEAKER_5POINT1 (SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | SPEAKER_FRONT_CENTER | SPEAKER_LOW_FREQUENCY | SPEAKER_BACK_LEFT | SPEAKER_BACK_RIGHT)
+#define KSAUDIO_SPEAKER_5POINT1_SURROUND (SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | SPEAKER_FRONT_CENTER | SPEAKER_LOW_FREQUENCY | SPEAKER_SIDE_LEFT | SPEAKER_SIDE_RIGHT)
 #define KSAUDIO_SPEAKER_7POINT1 (KSAUDIO_SPEAKER_5POINT1 | SPEAKER_FRONT_LEFT_OF_CENTER | SPEAKER_FRONT_RIGHT_OF_CENTER)
+#define KSAUDIO_SPEAKER_7POINT1_SURROUND (KSAUDIO_SPEAKER_5POINT1 | SPEAKER_SIDE_LEFT | SPEAKER_SIDE_RIGHT)
 
 #ifndef REFERENCE_TIME_DEFINED
 #define REFERENCE_TIME_DEFINED