Index: symon/symonnet.c
--- symon/symonnet.c.orig
+++ symon/symonnet.c
@@ -73,7 +73,7 @@ send_packet(struct mux * mux)
     if (sendto(mux->symuxsocket, mux->packet.data,
                mux->packet.offset, 0, (struct sockaddr *) & mux->sockaddr,
                SS_LEN(&mux->sockaddr))
-        != mux->packet.offset) {
+        != (ssize_t)mux->packet.offset) {
         mux->senderr++;
     }
 
