diff --git a/include/linux/sched.h b/include/linux/sched.h
index 8f983293b403da8e06db1778a5e37f6dc4d9479e..6dd06494997a05b44070aaf56ec9ce5fa816dd3d 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -2259,7 +2259,6 @@ extern struct sigqueue *sigqueue_alloc(void);
 extern void sigqueue_free(struct sigqueue *);
 extern int send_sigqueue(struct sigqueue *,  struct task_struct *, int group);
 extern int do_sigaction(int, struct k_sigaction *, struct k_sigaction *);
-extern int do_sigaltstack(const stack_t __user *, stack_t __user *, unsigned long);
 
 static inline void restore_saved_sigmask(void)
 {
diff --git a/kernel/signal.c b/kernel/signal.c
index 87c09e3061d20eaf666347daff67c87d1b28bda5..6919050c81560c3604550fdbd9b92679b806e5c1 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -3129,7 +3129,7 @@ int do_sigaction(int sig, struct k_sigaction *act, struct k_sigaction *oact)
 	return 0;
 }
 
-int 
+static int 
 do_sigaltstack (const stack_t __user *uss, stack_t __user *uoss, unsigned long sp)
 {
 	stack_t oss;