diff --git a/include/linux/netfilter.h b/include/linux/netfilter.h
index b7e67d1..707bb2e 100644
--- a/include/linux/netfilter.h
+++ b/include/linux/netfilter.h
@@ -290,7 +290,7 @@
 
 struct nf_afinfo {
 	unsigned short	family;
-	unsigned int	(*checksum)(struct sk_buff *skb, unsigned int hook,
+	__sum16		(*checksum)(struct sk_buff *skb, unsigned int hook,
 				    unsigned int dataoff, u_int8_t protocol);
 	void		(*saveroute)(const struct sk_buff *skb,
 				     struct nf_info *info);
@@ -305,12 +305,12 @@
 	return rcu_dereference(nf_afinfo[family]);
 }
 
-static inline unsigned int
+static inline __sum16
 nf_checksum(struct sk_buff *skb, unsigned int hook, unsigned int dataoff,
 	    u_int8_t protocol, unsigned short family)
 {
 	struct nf_afinfo *afinfo;
-	unsigned int csum = 0;
+	__sum16 csum = 0;
 
 	rcu_read_lock();
 	afinfo = nf_get_afinfo(family);
diff --git a/include/linux/netfilter_ipv4.h b/include/linux/netfilter_ipv4.h
index 5b63a23..5821eb5 100644
--- a/include/linux/netfilter_ipv4.h
+++ b/include/linux/netfilter_ipv4.h
@@ -79,7 +79,7 @@
 #ifdef __KERNEL__
 extern int ip_route_me_harder(struct sk_buff **pskb, unsigned addr_type);
 extern int ip_xfrm_me_harder(struct sk_buff **pskb);
-extern unsigned int nf_ip_checksum(struct sk_buff *skb, unsigned int hook,
+extern __sum16 nf_ip_checksum(struct sk_buff *skb, unsigned int hook,
 				   unsigned int dataoff, u_int8_t protocol);
 #endif /*__KERNEL__*/
 
diff --git a/include/linux/netfilter_ipv6.h b/include/linux/netfilter_ipv6.h
index d97e268..ab81a6d 100644
--- a/include/linux/netfilter_ipv6.h
+++ b/include/linux/netfilter_ipv6.h
@@ -74,7 +74,7 @@
 
 #ifdef CONFIG_NETFILTER
 extern int ip6_route_me_harder(struct sk_buff *skb);
-extern unsigned int nf_ip6_checksum(struct sk_buff *skb, unsigned int hook,
+extern __sum16 nf_ip6_checksum(struct sk_buff *skb, unsigned int hook,
 				    unsigned int dataoff, u_int8_t protocol);
 
 extern int ipv6_netfilter_init(void);
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 874ca02..4175366 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -1398,7 +1398,7 @@
 
 extern void __net_timestamp(struct sk_buff *skb);
 
-extern unsigned int __skb_checksum_complete(struct sk_buff *skb);
+extern __sum16 __skb_checksum_complete(struct sk_buff *skb);
 
 /**
  *	skb_checksum_complete - Calculate checksum of an entire packet
diff --git a/include/net/tcp.h b/include/net/tcp.h
index 826aaec..aa7989c5 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -814,7 +814,7 @@
 	return csum_tcpudp_magic(saddr,daddr,len,IPPROTO_TCP,base);
 }
 
-static inline int __tcp_checksum_complete(struct sk_buff *skb)
+static inline __sum16 __tcp_checksum_complete(struct sk_buff *skb)
 {
 	return __skb_checksum_complete(skb);
 }
diff --git a/include/net/udp.h b/include/net/udp.h
index 39e825a..c5ccd9a 100644
--- a/include/net/udp.h
+++ b/include/net/udp.h
@@ -69,15 +69,15 @@
 /*
  *	Generic checksumming routines for UDP(-Lite) v4 and v6
  */
-static inline u16  __udp_lib_checksum_complete(struct sk_buff *skb)
+static inline __sum16 __udp_lib_checksum_complete(struct sk_buff *skb)
 {
 	if (! UDP_SKB_CB(skb)->partial_cov)
 		return __skb_checksum_complete(skb);
-	return  csum_fold(skb_checksum(skb, 0, UDP_SKB_CB(skb)->cscov,
-			  skb->csum));
+	return csum_fold(skb_checksum(skb, 0, UDP_SKB_CB(skb)->cscov,
+				      skb->csum));
 }
 
-static __inline__ int udp_lib_checksum_complete(struct sk_buff *skb)
+static inline __sum16 udp_lib_checksum_complete(struct sk_buff *skb)
 {
 	return skb->ip_summed != CHECKSUM_UNNECESSARY &&
 		__udp_lib_checksum_complete(skb);