diff --git a/freebsd/sys/kern/subr_sleepqueue.c b/freebsd/sys/kern/subr_sleepqueue.c
index 00740ae4..ae934835 100644
--- a/freebsd/sys/kern/subr_sleepqueue.c
+++ b/freebsd/sys/kern/subr_sleepqueue.c
@@ -89,6 +89,7 @@ __FBSDID("$FreeBSD$");
 #ifdef __rtems__
 #include <machine/rtems-bsd-thread.h>
 #include <rtems/score/threadimpl.h>
+#include <rtems/score/watchdogimpl.h>
 #endif /* __rtems__ */
 
 /*