diff --git a/pdfio-private.h b/pdfio-private.h
index 55bf7e6..ca8968a 100644
--- a/pdfio-private.h
+++ b/pdfio-private.h
@@ -10,7 +10,7 @@
 #ifndef PDFIO_PRIVATE_H
 #  define PDFIO_PRIVATE_H
 #  ifdef _WIN32
-#    define _CRT_SECURE_NO_WARNINGS	// Disable bogus VS warnings/errors...
+#    define _CRT_SECURE_NO_WARNINGS 1	// Disable bogus VS warnings/errors...
 #  endif // _WIN32
 #  include "pdfio.h"
 #  include <stdarg.h>
diff --git a/test.h b/test.h
index 7b30c38..bee522e 100644
--- a/test.h
+++ b/test.h
@@ -33,6 +33,7 @@
 #  include <stdbool.h>
 #  include <string.h>
 #  if _WIN32
+#    include <io.h>
 #    define isatty(f) _isatty(f)
 #  else
 #    include <unistd.h>
diff --git a/testpdfio.c b/testpdfio.c
index 19fed4b..39ff8f1 100644
--- a/testpdfio.c
+++ b/testpdfio.c
@@ -1,7 +1,7 @@
 //
 // Test program for PDFio.
 //
-// Copyright © 2021-2024 by Michael R Sweet.
+// Copyright © 2021-2025 by Michael R Sweet.
 //
 // Licensed under Apache License v2.0.  See the file "LICENSE" for more
 // information.
@@ -13,9 +13,9 @@
 //   ./testpdfio [--verbose] FILENAME [OBJECT-NUMBER] [FILENAME [OBJECT-NUMBER]] ...
 //
 
-#include "test.h"
 #include "pdfio-private.h"
 #include "pdfio-content.h"
+#include "test.h"
 #include <math.h>
 #include <locale.h>
 #ifndef M_PI