diff --git a/reactos/lib/drivers/sound/mment4/control.c b/reactos/lib/drivers/sound/mment4/control.c
index 66a5c0991c7..d454bea89b5 100644
--- a/reactos/lib/drivers/sound/mment4/control.c
+++ b/reactos/lib/drivers/sound/mment4/control.c
@@ -8,9 +8,11 @@
  * PROGRAMMERS: Andrew Greenwood (silverblade@reactos.org)
 */
 
-#define NDEBUG
 #include "precomp.h"
 
+#include <winioctl.h>
+#include <ntddsnd.h>
+
 /*
     Convenience routine for getting the path of a device and opening it.
 */
diff --git a/reactos/lib/drivers/sound/mment4/detect.c b/reactos/lib/drivers/sound/mment4/detect.c
index dd5d9ac2410..2daa8b4e7ff 100644
--- a/reactos/lib/drivers/sound/mment4/detect.c
+++ b/reactos/lib/drivers/sound/mment4/detect.c
@@ -13,6 +13,8 @@
 
 #include "precomp.h"
 
+#include <mment4.h>
+
 /*
     This is the "nice" way to discover audio devices in NT4 - go into the
     service registry key and enumerate the Parameters\Device*\Devices
diff --git a/reactos/lib/drivers/sound/mment4/precomp.h b/reactos/lib/drivers/sound/mment4/precomp.h
index cece5d1ea25..848b5c8a9da 100644
--- a/reactos/lib/drivers/sound/mment4/precomp.h
+++ b/reactos/lib/drivers/sound/mment4/precomp.h
@@ -1,8 +1,9 @@
-#include <windows.h>
-#include <mmsystem.h>
+#include <stdarg.h>
+#include <windef.h>
+#include <winbase.h>
+#include <winreg.h>
+#include <winuser.h>
 #include <mmddk.h>
-#include <ntddsnd.h>
 #include <sndnames.h>
 #include <sndtypes.h>
 #include <mmebuddy.h>
-#include <mment4.h>