diff --git a/include/net/ndisc.h b/include/net/ndisc.h
index 52eae0943433..9bbdf6eaa942 100644
--- a/include/net/ndisc.h
+++ b/include/net/ndisc.h
@@ -488,9 +488,6 @@ void igmp6_event_report(struct sk_buff *skb);
 #ifdef CONFIG_SYSCTL
 int ndisc_ifinfo_sysctl_change(struct ctl_table *ctl, int write,
 			       void *buffer, size_t *lenp, loff_t *ppos);
-int ndisc_ifinfo_sysctl_strategy(struct ctl_table *ctl,
-				 void __user *oldval, size_t __user *oldlenp,
-				 void __user *newval, size_t newlen);
 #endif
 
 void inet6_ifinfo_notify(int event, struct inet6_dev *idev);