diff --git a/usr.bin/ipcs/ipcs.c b/usr.bin/ipcs/ipcs.c
index 9611f23d7613..f7f3956de1ab 100644
--- a/usr.bin/ipcs/ipcs.c
+++ b/usr.bin/ipcs/ipcs.c
@@ -654,6 +654,6 @@ usage()
 {
 
 	fprintf(stderr,
-	    "usage: ipcs [-abcmopqsty] [-C corefile] [-N namelist]\n");
+	    "usage: ipcs [-abcmopqstyMQST] [-C corefile] [-N namelist]\n");
 	exit(1);
 }