diff --git a/include/linux/sched.h b/include/linux/sched.h
index dede82c63445..5e8a0ba61749 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1240,7 +1240,6 @@ extern struct   mm_struct init_mm;
 
 #define find_task_by_pid(nr)	find_task_by_pid_type(PIDTYPE_PID, nr)
 extern struct task_struct *find_task_by_pid_type(int type, int pid);
-extern void set_special_pids(pid_t session, pid_t pgrp);
 extern void __set_special_pids(pid_t session, pid_t pgrp);
 
 /* per-UID process charging. */
diff --git a/kernel/exit.c b/kernel/exit.c
index fa235779b6a3..fa0495e167e9 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -314,7 +314,7 @@ void __set_special_pids(pid_t session, pid_t pgrp)
 	}
 }
 
-void set_special_pids(pid_t session, pid_t pgrp)
+static void set_special_pids(pid_t session, pid_t pgrp)
 {
 	write_lock_irq(&tasklist_lock);
 	__set_special_pids(session, pgrp);