diff --git a/usr.sbin/mixer/mixer.c b/usr.sbin/mixer/mixer.c
--- a/usr.sbin/mixer/mixer.c
+++ b/usr.sbin/mixer/mixer.c
@@ -65,7 +65,7 @@
 	int aflag = 0, dflag = 0, oflag = 0, sflag = 0;
 	int ch;
 
-	while ((ch = getopt(argc, argv, "ad:f:os")) != -1) {
+	while ((ch = getopt(argc, argv, "ad:f:hos")) != -1) {
 		switch (ch) {
 		case 'a':
 			aflag = 1;
@@ -85,6 +85,7 @@
 		case 's':
 			sflag = 1;
 			break;
+		case 'h': /* FALLTROUGH */
 		case '?':
 		default:
 			usage();
@@ -175,7 +176,8 @@
 usage(void)
 {
 	fprintf(stderr, "usage: %1$s [-f device] [-d unit] [-os] [dev[.control[=value]]] ...\n"
-	    "       %1$s [-d unit] [-os] -a\n", getprogname());
+	    "       %1$s [-d unit] [-os] -a\n"
+	    "       %1$s -h\n", getprogname());
 	exit(1);
 }