diff --git a/src/xz/util.c b/src/xz/util.c
index e5485bee..bb9b86ad 100644
--- a/src/xz/util.c
+++ b/src/xz/util.c
@@ -12,6 +12,10 @@
 #include "private.h"
 #include <stdarg.h>
 
+#if defined(_WIN32) && !defined(__CYGWIN__)
+#	include <io.h>
+#endif
+
 
 /// Buffers for uint64_to_str() and uint64_to_nicestr()
 static char bufs[4][128];