--- ./testbed/testcms2.h~0	2016-07-20 10:46:01.000000000 +0300
+++ ./testbed/testcms2.h	2017-09-14 18:27:20.106000000 +0300
@@ -33,6 +33,10 @@
 #     include <io.h>
 #endif
 
+#ifdef __MINGW32__
+#     include <io.h>
+#endif
+
 #include "lcms2_internal.h"
 
 #define cmsmin(a, b) (((a) < (b)) ? (a) : (b))
