diff --git a/image/sys/ansi.h b/image/sys/ansi.h
index 07b9566..26a4e7d 100644
--- a/image/sys/ansi.h
+++ b/image/sys/ansi.h
@@ -27,6 +27,8 @@
 //*@@@---@@@@******************************************************************
 #pragma once
 
+#include <stdint.h>
+
 //================================
 // bitio functions
 //================================
@@ -42,11 +44,5 @@
 //================================
 // common defines
 //================================
-#if __LP64__
-#define UINTPTR_T unsigned long long
-#define INTPTR_T long long
-#else
-#define UINTPTR_T unsigned int
-#define INTPTR_T int
-#endif
-
+#define UINTPTR_T uintptr_t
+#define INTPTR_T intptr_t