1 files changed, 2 insertions, 2 deletions

diff --git a/mps/code/protw3.c b/mps/code/protw3.c
index 8a9e690b62d..03af9ff40cf 100644
--- a/mps/code/protw3.c
+++ b/mps/code/protw3.c
@@ -42,7 +42,7 @@ void ProtSet(Addr base, Addr limit, AccessSet mode)
   if((mode & AccessREAD) != 0)
     newProtect = PAGE_NOACCESS;
 
-  if(VirtualProtect((LPVOID)base, (DWORD)AddrOffset(base, limit),
+  if(VirtualProtect((LPVOID)base, (SIZE_T)AddrOffset(base, limit),
                     newProtect, &oldProtect) == 0)
     NOTREACHED;
 }
@@ -52,7 +52,7 @@ LONG ProtSEHfilter(LPEXCEPTION_POINTERS info)
 {
   LPEXCEPTION_RECORD er;
   DWORD iswrite;
-  DWORD address;
+  ULONG_PTR address;
   AccessSet mode;
   Addr base, limit;
   LONG action;