diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index cc47812..320a7aa 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -275,6 +275,10 @@ ktime_t ktime_add_ns(const ktime_t kt, u64 nsec)
 	} else {
 		unsigned long rem = do_div(nsec, NSEC_PER_SEC);
 
+		/* Make sure nsec fits into long */
+		if (unlikely(nsec > KTIME_SEC_MAX))
+			return (ktime_t){ .tv64 = KTIME_MAX };
+
 		tmp = ktime_set((long)nsec, rem);
 	}