diff --git a/win.c b/win.c
index 723f5d5..342e1b5 100644
--- a/win.c
+++ b/win.c
@@ -62,19 +62,15 @@ void* mmap(void *addr, size_t len, int prot, int flags, int fildes, ssize_t off)
 #pragma warning(disable: 4293)
 #endif
 
-    const DWORD dwFileOffsetLow = (sizeof(ssize_t) <= sizeof(DWORD)) ? 
-                    (DWORD)off : (DWORD)(off & 0xFFFFFFFFL);
-    const DWORD dwFileOffsetHigh = (sizeof(ssize_t) <= sizeof(DWORD)) ?
-                    (DWORD)0 : (DWORD)((off >> 32) & 0xFFFFFFFFL);
+    const DWORD dwFileOffsetLow = (DWORD)(off & 0xFFFFFFFFL);
+    const DWORD dwFileOffsetHigh = (DWORD)((off >> 32) & 0xFFFFFFFFL);
     const DWORD protect = __map_mmap_prot_page(prot);
     const DWORD desiredAccess = __map_mmap_prot_file(prot);
 
     const ssize_t maxSize = off + (ssize_t)len;
 
-    const DWORD dwMaxSizeLow = (sizeof(ssize_t) <= sizeof(DWORD)) ? 
-                    (DWORD)maxSize : (DWORD)(maxSize & 0xFFFFFFFFL);
-    const DWORD dwMaxSizeHigh = (sizeof(ssize_t) <= sizeof(DWORD)) ?
-                    (DWORD)0 : (DWORD)((maxSize >> 32) & 0xFFFFFFFFL);
+    const DWORD dwMaxSizeLow = (DWORD)(maxSize & 0xFFFFFFFFL);
+    const DWORD dwMaxSizeHigh = (DWORD)((maxSize >> 32) & 0xFFFFFFFFL);
 
 #ifdef _MSC_VER
 #pragma warning(pop)
@@ -108,11 +104,11 @@ void* mmap(void *addr, size_t len, int prot, int flags, int fildes, ssize_t off)
         errno = __map_mman_error(GetLastError(), EPERM);
         return MAP_FAILED;
     }
-  
+
     map = MapViewOfFile(fm, desiredAccess, dwFileOffsetHigh, dwFileOffsetLow, len);
 
     CloseHandle(fm);
-  
+
     if (map == NULL)
     {
         errno = __map_mman_error(GetLastError(), EPERM);