diff --git a/kernel/posix-cpu-timers.c b/kernel/posix-cpu-timers.c
index bece7c0..e33a21c 100644
--- a/kernel/posix-cpu-timers.c
+++ b/kernel/posix-cpu-timers.c
@@ -521,11 +521,12 @@
 }
 void posix_cpu_timers_exit_group(struct task_struct *tsk)
 {
-	struct task_cputime cputime;
+	struct signal_struct *const sig = tsk->signal;
 
-	thread_group_cputimer(tsk, &cputime);
 	cleanup_timers(tsk->signal->cpu_timers,
-		       cputime.utime, cputime.stime, cputime.sum_exec_runtime);
+		       cputime_add(tsk->utime, sig->utime),
+		       cputime_add(tsk->stime, sig->stime),
+		       tsk->se.sum_exec_runtime + sig->sum_sched_runtime);
 }
 
 static void clear_dead_task(struct k_itimer *timer, union cpu_time_count now)