diff --git a/aucat/aucat.c b/aucat/aucat.c
index d41f95b..f9c4158 100644
--- a/aucat/aucat.c
+++ b/aucat/aucat.c
@@ -429,7 +429,7 @@ main(int argc, char **argv)
 	else
 		prog++;
 	if (strcmp(prog, PROG_AUCAT) == 0) {
-		optstr = "a:b:c:C:de:f:j:L:m:Mq:r:s:t:U:v:w:x:z:";
+ 		optstr = "a:b:c:C:de:f:h:i:j:lL:m:Mno:q:r:s:t:U:v:w:x:z:";
 		usagestr = aucat_usage;
 		hold = 1;
 	} else if (strcmp(prog, PROG_SNDIOD) == 0) {