diff --git a/kernel/tsacct.c b/kernel/tsacct.c
index a1dd9a1..ea6d170 100644
--- a/kernel/tsacct.c
+++ b/kernel/tsacct.c
@@ -38,7 +38,7 @@
 	BUILD_BUG_ON(TS_COMM_LEN < TASK_COMM_LEN);
 
 	/* calculate task elapsed time in timespec */
-	do_posix_clock_monotonic_gettime(&uptime);
+	ktime_get_ts(&uptime);
 	ts = timespec_sub(uptime, tsk->start_time);
 	/* rebase elapsed time to usec (should never be negative) */
 	ac_etime = timespec_to_ns(&ts);