diff --git a/zebra/kernel_socket.c b/zebra/kernel_socket.c
index 2e04b03..e77b9b7 100644
--- a/zebra/kernel_socket.c
+++ b/zebra/kernel_socket.c
@@ -126,7 +126,7 @@
       (LEN) = 0; \
     }
 /* Routing socket message types. */
-struct message rtm_type_str[] =
+const struct message rtm_type_str[] =
 {
   {RTM_ADD,      "RTM_ADD"},
   {RTM_DELETE,   "RTM_DELETE"},
diff --git a/zebra/kernel_socket.h b/zebra/kernel_socket.h
index 8f8a207..e9558ad 100644
--- a/zebra/kernel_socket.h
+++ b/zebra/kernel_socket.h
@@ -28,6 +28,6 @@
 extern int ifm_read (struct if_msghdr *);
 extern int rtm_write (int, union sockunion *, union sockunion *,
                       union sockunion *, unsigned int, int, int);
-extern struct message rtm_type_str[];
+extern const struct message rtm_type_str[];
 
 #endif /* __ZEBRA_KERNEL_SOCKET_H */
diff --git a/zebra/rt_netlink.c b/zebra/rt_netlink.c
index 0a6b8dd..395f1ca 100644
--- a/zebra/rt_netlink.c
+++ b/zebra/rt_netlink.c
@@ -52,7 +52,7 @@
 } netlink      = { -1, 0, {0}, "netlink-listen"},     /* kernel messages */
   netlink_cmd  = { -1, 0, {0}, "netlink-cmd"};        /* command channel */
 
-static struct message nlmsg_str[] = {
+static const struct message nlmsg_str[] = {
   {RTM_NEWROUTE, "RTM_NEWROUTE"},
   {RTM_DELROUTE, "RTM_DELROUTE"},
   {RTM_GETROUTE, "RTM_GETROUTE"},
@@ -805,7 +805,7 @@
   return 0;
 }
 
-struct message rtproto_str[] = {
+static const struct message rtproto_str[] = {
   {RTPROT_REDIRECT, "redirect"},
   {RTPROT_KERNEL,   "kernel"},
   {RTPROT_BOOT,     "boot"},