diff --git a/include/linux/filter.h b/include/linux/filter.h
index 4609b85..9ee3f9f 100644
--- a/include/linux/filter.h
+++ b/include/linux/filter.h
@@ -131,6 +131,10 @@
 #define SKF_LL_OFF    (-0x200000)
 
 #ifdef __KERNEL__
+
+struct sk_buff;
+struct sock;
+
 struct sk_filter
 {
 	atomic_t		refcnt;
@@ -146,9 +150,6 @@
 	return fp->len * sizeof(struct sock_filter) + sizeof(*fp);
 }
 
-struct sk_buff;
-struct sock;
-
 extern int sk_filter(struct sock *sk, struct sk_buff *skb);
 extern unsigned int sk_run_filter(const struct sk_buff *skb,
 				  const struct sock_filter *filter);