diff --git a/net.c b/net.c
index 3cc3cdd..69f87d6 100644
--- a/net.c
+++ b/net.c
@@ -59,6 +59,7 @@ netannounce(int istcp, char *server, int port)
 	}
 	
 	/* set reuse flag for tcp */
+	sn = sizeof n;
 	if(istcp && getsockopt(fd, SOL_SOCKET, SO_TYPE, (void*)&n, &sn) >= 0){
 		n = 1;
 		setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char*)&n, sizeof n);