diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c
index e48c4d379a7c..78c91b0037f7 100644
--- a/kernel/time/clocksource.c
+++ b/kernel/time/clocksource.c
@@ -123,7 +123,6 @@ static atomic_t watchdog_reset_pending;
 
 /* Watchdog interval: 0.5sec. */
 #define WATCHDOG_INTERVAL		(HZ >> 1)
-#define WATCHDOG_INTERVAL_NS		(WATCHDOG_INTERVAL * (NSEC_PER_SEC / HZ))
 
 /* Maximum time between two reference watchdog readouts */
 #define WATCHDOG_READOUT_MAX_NS		(50U * NSEC_PER_USEC)