diff --git a/lib/net/net_mac.q b/lib/net/net_mac.q
index ce2de78..9dd1e23 100644
--- a/lib/net/net_mac.q
+++ b/lib/net/net_mac.q
@@ -1,6 +1,6 @@
 import sys
 
-bind(socket int, port int) -> int {
+bind(socket int, port uint16) -> int {
 	addr := new(sys.sockaddr_in_bsd)
 	addr.sin_family = 2
 	addr.sin_port = htons(port)