diff --git a/include/net/sock.h b/include/net/sock.h
index 7d7f4ce..6cbc161 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -2534,6 +2534,8 @@ extern int sysctl_optmem_max;
 extern __u32 sysctl_wmem_default;
 extern __u32 sysctl_rmem_default;
 
+DECLARE_STATIC_KEY_FALSE(net_high_order_alloc_disable_key);
+
 static inline int sk_get_wmem0(const struct sock *sk, const struct proto *proto)
 {
 	/* Does this proto have per netns sysctl_wmem ? */