diff --git a/test/run-tests.c b/test/run-tests.c
index 45e95290..37f91da4 100644
--- a/test/run-tests.c
+++ b/test/run-tests.c
@@ -22,6 +22,10 @@
 #include <stdio.h>
 #include <string.h>
 
+#ifdef _WIN32
+# include <io.h>
+#endif
+
 #include "uv.h"
 #include "runner.h"
 #include "task.h"