diff --git a/kernel/time/posix-stubs.c b/kernel/time/posix-stubs.c
index 9b6fcb8d85e7..5a27335a917e 100644
--- a/kernel/time/posix-stubs.c
+++ b/kernel/time/posix-stubs.c
@@ -83,7 +83,7 @@ SYSCALL_DEFINE2(clock_getres, const clockid_t, which_clock, struct __kernel_time
 	case CLOCK_REALTIME:
 	case CLOCK_MONOTONIC:
 	case CLOCK_BOOTTIME:
-		if (put_timespec64(&rtn_tp, tp))
+		if (tp && put_timespec64(&rtn_tp, tp))
 			return -EFAULT;
 		return 0;
 	default:
@@ -166,7 +166,7 @@ SYSCALL_DEFINE2(clock_getres_time32, clockid_t, which_clock,
 	case CLOCK_REALTIME:
 	case CLOCK_MONOTONIC:
 	case CLOCK_BOOTTIME:
-		if (put_old_timespec32(&rtn_tp, tp))
+		if (tp && put_old_timespec32(&rtn_tp, tp))
 			return -EFAULT;
 		return 0;
 	default: