diff --git a/src/net.c b/src/net.c
index 5201d69..a9fb7ca 100644
--- a/src/net.c
+++ b/src/net.c
@@ -113,14 +113,14 @@ bool net_set_timeout(net_t *const n, int usec) {
     return true;
 }
 
-ssize_t net_send(net_t *const n, const char *const buf, int buf_len) {
+ssize_t net_send(const net_t *const n, const char *const buf, const size_t buf_len) {
     if (n->fd == -1 || n->raddr.sa_family == AF_UNSPEC)
         return -1;
 
     return sendto(n->fd, buf, buf_len, 0, &n->raddr, sizeof(n->raddr));
 }
 
-ssize_t net_recv(net_t *const n, void *const buf, size_t buf_len) {
+ssize_t net_recv(net_t *const n, void *const buf, const size_t buf_len) {
     if (n->fd == -1)
         return -1;
 
diff --git a/src/net.h b/src/net.h
index 8e4bcf2..1ee9207 100644
--- a/src/net.h
+++ b/src/net.h
@@ -16,7 +16,7 @@ void net_destroy(net_t *n);
 
 bool net_set_timeout(net_t *const n, int usec);
 
-ssize_t net_send(net_t *const n, const char *const buf, int buf_len);
-ssize_t net_recv(net_t *const n, void *const buf, size_t buf_len);
+ssize_t net_send(const net_t *const n, const char *const buf, const size_t buf_len);
+ssize_t net_recv(net_t *const n, void *const buf, const size_t buf_len);
 
 #endif /* _NET_H_ */