diff --git a/reactos/include/psdk/winnt.h b/reactos/include/psdk/winnt.h
index 2f9b9c2fefd..3b821de888d 100644
--- a/reactos/include/psdk/winnt.h
+++ b/reactos/include/psdk/winnt.h
@@ -54,7 +54,6 @@ extern "C" {
 #include <winerror.h>
 #include <stddef.h>
 #include <sdkddkver.h>
-#include <stdint.h>
 
 #ifndef RC_INVOKED
 #include <string.h>
@@ -103,12 +102,12 @@ typedef char CHAR;
 typedef short SHORT;
 #ifndef LONG_DEFINED
 #define LONG_DEFINED
-    typedef int32_t LONG;
-    typedef uint32_t ULONG,*PULONG;
+    typedef long LONG;
+    typedef unsigned long ULONG,*PULONG;
 #endif//LONG_DEFINED
 typedef char CCHAR, *PCCHAR;
-typedef uint8_t UCHAR,*PUCHAR;
-typedef uint16_t USHORT,*PUSHORT;
+typedef unsigned char UCHAR,*PUCHAR;
+typedef unsigned short USHORT,*PUSHORT;
 typedef char *PSZ;
 
 typedef void *PVOID,*LPVOID;