diff --git a/include/net/tcp.h b/include/net/tcp.h
index 185c7ec..54053de 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -1059,14 +1059,12 @@
 };
 
 struct tcp4_md5sig_key {
-	u8			*key;
-	u16			keylen;
+	struct tcp_md5sig_key	base;
 	__be32			addr;
 };
 
 struct tcp6_md5sig_key {
-	u8			*key;
-	u16			keylen;
+	struct tcp_md5sig_key	base;
 #if 0
 	u32			scope_id;	/* XXX */
 #endif