diff --git a/winsup/w32api/ChangeLog b/winsup/w32api/ChangeLog
index 8728c997f..6dd08f68c 100644
--- a/winsup/w32api/ChangeLog
+++ b/winsup/w32api/ChangeLog
@@ -1,9 +1,14 @@
-2006-05-02  Dimitri Papadopoulos  <papadopo@users.sourceforge.net>
+2006-05-03  Dimitri Papadopoulos  <papadopo@users.sourceforge.net>
+
+	* include/amaudio.h: New file.
+	* include/dshow.h: Include <amaudio.h>.
+
+2006-05-03  Dimitri Papadopoulos  <papadopo@users.sourceforge.net>
 
 	* include/errors.h: New file.
 	* include/dshow.h: Include <errors.h>.
 
-2006-05-02  Dimitri Papadopoulos  <papadopo@users.sourceforge.net>
+2006-05-03  Dimitri Papadopoulos  <papadopo@users.sourceforge.net>
 
 	* include/dshow.h: New file.
 	* include/evcode.h: New file.
diff --git a/winsup/w32api/include/amaudio.h b/winsup/w32api/include/amaudio.h
new file mode 100644
index 000000000..94e23ac53
--- /dev/null
+++ b/winsup/w32api/include/amaudio.h
@@ -0,0 +1,33 @@
+#ifndef _AMAUDIO_H
+#define _AMAUDIO_H
+#if __GNUC__ >= 3
+#pragma GCC system_header
+#endif
+
+#include <dsound.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define INTERFACE IAMDirectSound
+DECLARE_INTERFACE_(IAMDirectSound, IUnknown)
+{
+	STDMETHOD(QueryInterface)(THIS_ REFIID,LPVOID*) PURE;
+	STDMETHOD_(ULONG,AddRef)(THIS) PURE;
+	STDMETHOD_(ULONG,Release)(THIS) PURE;
+	STDMETHOD(GetDirectSoundInterface)(THIS_ LPDIRECTSOUND*) PURE;
+	STDMETHOD(GetPrimaryBufferInterface)(THIS_ LPDIRECTSOUNDBUFFER*) PURE;
+	STDMETHOD(GetSecondaryBufferInterface)(THIS_ LPDIRECTSOUNDBUFFER*) PURE;
+	STDMETHOD(GetFocusWindow)(THIS_ HWND*,BOOL*) PURE ;
+	STDMETHOD(ReleaseDirectSoundInterface)(THIS_ LPDIRECTSOUND) PURE;
+	STDMETHOD(ReleasePrimaryBufferInterface)(THIS_ LPDIRECTSOUNDBUFFER) PURE;
+	STDMETHOD(ReleaseSecondaryBufferInterface)(THIS_ LPDIRECTSOUNDBUFFER) PURE;
+	STDMETHOD(SetFocusWindow)(THIS_ HWND,BOOL) PURE ;
+};
+#undef INTERFACE
+
+#ifdef __cplusplus
+}
+#endif
+#endif
diff --git a/winsup/w32api/include/dshow.h b/winsup/w32api/include/dshow.h
index fce9a6124..be12c22de 100644
--- a/winsup/w32api/include/dshow.h
+++ b/winsup/w32api/include/dshow.h
@@ -4,6 +4,7 @@
 #pragma GCC system_header
 #endif
 
+#include <amaudio.h>
 #include <evcode.h>
 #include <audevcod.h>
 #include <dvdevcod.h>