diff --git a/include/linux/tcp.h b/include/linux/tcp.h
index 8afac76..61723a7 100644
--- a/include/linux/tcp.h
+++ b/include/linux/tcp.h
@@ -233,7 +233,7 @@
 	struct inet_request_sock 	req;
 #ifdef CONFIG_TCP_MD5SIG
 	/* Only used by TCP MD5 Signature so far. */
-	struct tcp_request_sock_ops	*af_specific;
+	const struct tcp_request_sock_ops *af_specific;
 #endif
 	u32			 	rcv_isn;
 	u32			 	snt_isn;
@@ -401,9 +401,9 @@
 
 #ifdef CONFIG_TCP_MD5SIG
 /* TCP AF-Specific parts; only used by MD5 Signature support so far */
-	struct tcp_sock_af_ops	*af_specific;
+	const struct tcp_sock_af_ops	*af_specific;
 
-/* TCP MD5 Signagure Option information */
+/* TCP MD5 Signature Option information */
 	struct tcp_md5sig_info	*md5sig_info;
 #endif
 };