diff --git a/Python/fileutils.c b/Python/fileutils.c
index e84d66e..f3764e4 100644
--- a/Python/fileutils.c
+++ b/Python/fileutils.c
@@ -583,7 +583,7 @@
     FILE_TIME_to_time_t_nsec(&info->ftLastWriteTime, &result->st_mtime, &result->st_mtime_nsec);
     FILE_TIME_to_time_t_nsec(&info->ftLastAccessTime, &result->st_atime, &result->st_atime_nsec);
     result->st_nlink = info->nNumberOfLinks;
-    result->st_ino = (((__int64)info->nFileIndexHigh)<<32) + info->nFileIndexLow;
+    result->st_ino = (((uint64_t)info->nFileIndexHigh) << 32) + info->nFileIndexLow;
     if (reparse_tag == IO_REPARSE_TAG_SYMLINK) {
         /* first clear the S_IFMT bits */
         result->st_mode ^= (result->st_mode & S_IFMT);
@@ -653,7 +653,7 @@
 
     _Py_attribute_data_to_stat(&info, 0, status);
     /* specific to fstat() */
-    status->st_ino = (((__int64)info.nFileIndexHigh)<<32) + info.nFileIndexLow;
+    status->st_ino = (((uint64_t)info.nFileIndexHigh) << 32) + info.nFileIndexLow;
     return 0;
 #else
     return fstat(fd, status);