diff --git a/include/net/request_sock.h b/include/net/request_sock.h
index a0dde04..f49759d 100644
--- a/include/net/request_sock.h
+++ b/include/net/request_sock.h
@@ -68,7 +68,7 @@
 	u32				peer_secid;
 };
 
-static inline struct request_sock *inet_reqsk(struct sock *sk)
+static inline struct request_sock *inet_reqsk(const struct sock *sk)
 {
 	return (struct request_sock *)sk;
 }