Add direct sound driver guids.

diff --git a/libs/uuid/dxguid.c b/libs/uuid/dxguid.c
index 00cbc6c..3f4ff8a 100644
--- a/libs/uuid/dxguid.c
+++ b/libs/uuid/dxguid.c
@@ -33,6 +33,7 @@
 #include "d3d.h"
 #include "ddraw.h"
 #include "dsound.h"
+#include "dsdriver.h"
 #include "dmusicc.h"
 #include "dmusici.h"
 #include "dmusics.h"