diff --git a/rtemsbsd/freebsd/machine/rtems-bsd-config.h.in b/rtemsbsd/freebsd/machine/rtems-bsd-config.h.in
index 15beb14f..655d319a 100644
--- a/rtemsbsd/freebsd/machine/rtems-bsd-config.h.in
+++ b/rtemsbsd/freebsd/machine/rtems-bsd-config.h.in
@@ -221,6 +221,7 @@
 #define abs _bsd_abs
 #define labs _bsd_labs
 
+#include <rtems/score/watchdogimpl.h>
 #define ticks _Watchdog_Ticks_since_boot
 
 /* Debug */