diff --git a/reactos/drivers/filesystems/ext2/inc/ext2fsd.h b/reactos/drivers/filesystems/ext2/inc/ext2fsd.h
index 06fb44ba98b..db76760e4d0 100644
--- a/reactos/drivers/filesystems/ext2/inc/ext2fsd.h
+++ b/reactos/drivers/filesystems/ext2/inc/ext2fsd.h
@@ -31,23 +31,8 @@
 //	Some type definitions...
 //	These are used later...
 
-typedef unsigned char	UCHAR;
-typedef unsigned int	UINT;
-typedef UCHAR			BYTE;
-typedef UCHAR			BOOLEAN;        // winnt
-typedef BOOLEAN *		PBOOLEAN;       // winnt
-typedef void *			PVOID64;		// winnt
-typedef long			LONG;
-typedef LONG			HRESULT;
-
-
-#if defined(_M_IX86)
-#define FASTCALL _fastcall
-#else
-#define FASTCALL
-#endif
-
-
+typedef unsigned int    UINT;
+typedef unsigned char   BYTE;
 
 // Common include files - should be in the include dir of the MS supplied IFS Kit
 #include	<ntifs.h>