diff --git a/include/linux/sched.h b/include/linux/sched.h
index 5457b62..951759e 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -254,6 +254,7 @@
 
 extern void cpu_init (void);
 extern void trap_init(void);
+extern void account_process_tick(struct task_struct *task, int user);
 extern void update_process_times(int user);
 extern void scheduler_tick(void);