diff --git a/sys/include/net/sock.h b/sys/include/net/sock.h
index 8528ba7709..70ac5e024c 100644
--- a/sys/include/net/sock.h
+++ b/sys/include/net/sock.h
@@ -222,7 +222,7 @@ struct _sock_tl_ep {
      * over
      */
     uint16_t netif;
-    uint16_t port;          /**< transport layer port */
+    uint16_t port;          /**< transport layer port (in host byte order) */
 };
 
 #ifdef __cplusplus