diff --git a/src/tbox/platform/windows/fwatcher_iocp.c b/src/tbox/platform/windows/fwatcher_iocp.c
index 9ec9ee779..015c2591c 100644
--- a/src/tbox/platform/windows/fwatcher_iocp.c
+++ b/src/tbox/platform/windows/fwatcher_iocp.c
@@ -22,6 +22,7 @@
 /* //////////////////////////////////////////////////////////////////////////////////////
  * includes
  */
+#include "prefix.h"
 #include "../fwatcher.h"
 #include "../file.h"
 #include "../time.h"