diff --git a/programs/fileio.c b/programs/fileio.c
index d33c7f42..7ec4114b 100644
--- a/programs/fileio.c
+++ b/programs/fileio.c
@@ -61,6 +61,7 @@
 #if defined(MSDOS) || defined(OS2) || defined(WIN32) || defined(_WIN32) ||     \
     defined(__CYGWIN__)
 #include <io.h> /* _isatty */
+#include <sys/stat.h>
 #define IS_CONSOLE(stdStream) _isatty(_fileno(stdStream))
 #elif defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE) || defined(_POSIX_SOURCE) || (defined(__APPLE__) && defined(__MACH__)) || \
       defined(__DragonFly__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)  /* https://sourceforge.net/p/predef/wiki/OperatingSystems/ */