diff --git a/winsup/w32api/ChangeLog b/winsup/w32api/ChangeLog
index 86ce89ccb..5676ffc72 100644
--- a/winsup/w32api/ChangeLog
+++ b/winsup/w32api/ChangeLog
@@ -1,3 +1,8 @@
+2004-12-02  Danny Smith  <dannysmith@users.sourceforge.net>
+
+	* lib/directx/strmiids.c (MEDIASUBTYPE_YV12): Correct GUID.
+	Thanks to "Pete" <pross@xvid.org>
+
 2004-11-21 Benoit Blanchon  <bblanchon@users.sourceforge.net>
 
 	* include/wingdi.h (AC_SRC_ALPHA, AC_SRC_NO_ALPHA, 
diff --git a/winsup/w32api/lib/directx/strmiids.c b/winsup/w32api/lib/directx/strmiids.c
index 1f9c2fe78..91b4920fe 100644
--- a/winsup/w32api/lib/directx/strmiids.c
+++ b/winsup/w32api/lib/directx/strmiids.c
@@ -936,7 +936,7 @@ DEFINE_GUID(MEDIASUBTYPE_Y411,0x31313459,0x0000,0x0010,0x80,0x00,0x00,0xaa,0x00,
 DEFINE_GUID(MEDIASUBTYPE_Y41P,0x50313459,0x0000,0x0010,0x80,0x00,0x00,0xaa,0x00,0x38,0x9b,0x71);
 DEFINE_GUID(MEDIASUBTYPE_YUY2,0x32595559,0x0000,0x0010,0x80,0x00,0x00,0xaa,0x00,0x38,0x9b,0x71);
 DEFINE_GUID(MEDIASUBTYPE_YUYV,0x56595559,0x0000,0x0010,0x80,0x00,0x00,0xaa,0x00,0x38,0x9b,0x71);
-DEFINE_GUID(MEDIASUBTYPE_YV12,0x31313259,0x0000,0x0010,0x80,0x00,0x00,0xaa,0x00,0x38,0x9b,0x71);
+DEFINE_GUID(MEDIASUBTYPE_YV12,0x32315659,0x0000,0x0010,0x80,0x00,0x00,0xaa,0x00,0x38,0x9b,0x71);
 DEFINE_GUID(MEDIASUBTYPE_YVU9,0x39555659,0x0000,0x0010,0x80,0x00,0x00,0xaa,0x00,0x38,0x9b,0x71);
 DEFINE_GUID(MEDIASUBTYPE_YVYU,0x55595659,0x0000,0x0010,0x80,0x00,0x00,0xaa,0x00,0x38,0x9b,0x71);
 DEFINE_GUID(MEDIATYPE_AnalogAudio,0x0482dee1,0x7817,0x11cf,0x8a,0x03,0x00,0xaa,0x00,0x6e,0xcb,0x65);