diff --git a/gio/gcancellable.c b/gio/gcancellable.c
index 7de241a44..e54d6c897 100644
--- a/gio/gcancellable.c
+++ b/gio/gcancellable.c
@@ -28,6 +28,7 @@
 #include <gioerror.h>
 #ifdef G_OS_WIN32
 #include <windows.h>
+#include <io.h>
 #endif
 #include "gcancellable.h"
 #include "glibintl.h"