diff -urN echat-0.04beta1.org/sock_udp.c echat-0.04beta1/sock_udp.c
--- echat-0.04beta1.org/sock_udp.c	2003-08-20 15:11:25.000000000 +0200
+++ echat-0.04beta1/sock_udp.c	2003-08-20 15:27:01.000000000 +0200
@@ -110,7 +110,7 @@
         exit(EXIT_FAILURE);
     }
 #ifdef  PORTREUSE
-    if (setsockopt(sfdcl, SOL_SOCKET, SO_REUSEPORT, &s, sizeof(s)) < 0) {
+    if (setsockopt(sfdcl, SOL_SOCKET, SO_REUSEADDR, &s, sizeof(s)) < 0) {
 #ifdef  DEBUG
         fprintf(debug_file, "setsockopt(): %s\n", strerror(errno));
         fflush(debug_file);