diff --git a/net/ipv6/protocol.c b/net/ipv6/protocol.c
index 568864f..1fa3468 100644
--- a/net/ipv6/protocol.c
+++ b/net/ipv6/protocol.c
@@ -25,11 +25,11 @@
 #include <linux/spinlock.h>
 #include <net/protocol.h>
 
-struct inet6_protocol *inet6_protos[MAX_INET_PROTOS];
+const struct inet6_protocol *inet6_protos[MAX_INET_PROTOS];
 static DEFINE_SPINLOCK(inet6_proto_lock);
 
 
-int inet6_add_protocol(struct inet6_protocol *prot, unsigned char protocol)
+int inet6_add_protocol(const struct inet6_protocol *prot, unsigned char protocol)
 {
 	int ret, hash = protocol & (MAX_INET_PROTOS - 1);
 
@@ -53,7 +53,7 @@
  *	Remove a protocol from the hash tables.
  */
 
-int inet6_del_protocol(struct inet6_protocol *prot, unsigned char protocol)
+int inet6_del_protocol(const struct inet6_protocol *prot, unsigned char protocol)
 {
 	int ret, hash = protocol & (MAX_INET_PROTOS - 1);