diff --git a/net/rpmsg/rpmsg_sockif.c b/net/rpmsg/rpmsg_sockif.c
index b6bd3b9376235..822fb74f37226 100644
--- a/net/rpmsg/rpmsg_sockif.c
+++ b/net/rpmsg/rpmsg_sockif.c
@@ -376,7 +376,7 @@ static int rpmsg_socket_ept_cb(FAR struct rpmsg_endpoint *ept,
               written = circbuf_write(&conn->recvbuf, buf, len);
               if (written != len)
                 {
-                  nerr("circbuf_write overflow, %d, %d\n", written, len);
+                  nerr("circbuf_write overflow, %zu, %zu\n", written, len);
                 }
 
               rpmsg_socket_pollnotify(conn, POLLIN);