update usage
diff --git a/src/cmd/sam/io.c b/src/cmd/sam/io.c
index 8b6f281..95c2e0c 100644
--- a/src/cmd/sam/io.c
+++ b/src/cmd/sam/io.c
@@ -226,7 +226,7 @@
 	// count args
 	for(av = argv; *av; av++)
 		;
-	av = malloc(sizeof(char*)*((av-argv) + 10));
+	av = malloc(sizeof(char*)*((av-argv) + 5));
 	if(av == nil){
 		dprint("out of memory\n");
 		exits("fork/exec");
@@ -234,8 +234,6 @@
 	ac = 0;
 	av[ac++] = RX;
 	av[ac++] = machine;
-	if(rxopt)
-		av[ac++] = rxopt;
 	av[ac++] = rsamname;
 	av[ac++] = "-R";
 	while(*argv)