diff --git a/cmdline/mingw.c b/cmdline/mingw.c
index e1dd7a46..c9820783 100644
--- a/cmdline/mingw.c
+++ b/cmdline/mingw.c
@@ -2977,7 +2977,7 @@ static int devup(uint64_t device, const char* name, const char* wfile)
 	snprintf(file, sizeof(file), "/dev/pd%" PRIu64, device);
 
 	/* open the volume */
-	h = CreateFileW(convert(conv_buf, wfile), GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, 0, OPEN_EXISTING, FILE_FLAG_NO_BUFFERING | FILE_FLAG_WRITE_THROUGH, 0);
+	h = CreateFileW(convert(conv_buf, wfile), 0, FILE_SHARE_READ | FILE_SHARE_WRITE, 0, OPEN_EXISTING, 0, 0);
 	if (h == INVALID_HANDLE_VALUE) {
 		DWORD error = GetLastError();
 		windows_errno(error);