diff --git a/net/can/can_sendmsg_buffered.c b/net/can/can_sendmsg_buffered.c
index 7b0df1ad873..17967fc34ab 100644
--- a/net/can/can_sendmsg_buffered.c
+++ b/net/can/can_sendmsg_buffered.c
@@ -183,7 +183,7 @@ static uint32_t psock_send_eventhandler(FAR struct net_driver_s *dev,
  *
  ****************************************************************************/
 
-ssize_t can_sendmsg(FAR struct socket *psock, FAR struct msghdr *msg,
+ssize_t can_sendmsg(FAR struct socket *psock, FAR const struct msghdr *msg,
                     int flags)
 {
   FAR struct net_driver_s *dev;