diff --git a/Tools/Conf/Pcd/PcdDatabaseCommonDefinitions.sample b/Tools/Conf/Pcd/PcdDatabaseCommonDefinitions.sample
index d441aa0515..011d3df603 100644
--- a/Tools/Conf/Pcd/PcdDatabaseCommonDefinitions.sample
+++ b/Tools/Conf/Pcd/PcdDatabaseCommonDefinitions.sample
@@ -49,7 +49,7 @@ typedef struct {
   UINT16 Size;
 } SIZEINFO;
 
-#define offsetof(s,m)                 (UINT32)&(((s *)0)->m)
+#define offsetof(s,m)                 (UINT32) (UINTN) &(((s *)0)->m)