diff --git a/share/examples/sound/midi.c b/share/examples/sound/midi.c
index 7149bcb31c82..6d6ac9aa0fcd 100644
--- a/share/examples/sound/midi.c
+++ b/share/examples/sound/midi.c
@@ -1,76 +1,76 @@
 /*
  * SPDX-License-Identifier: BSD-2-Clause
  *
  * Copyright (c) 2022 Goran Mekić
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  */
 
 #include <unistd.h>
 
 #include "ossmidi.h"
 
 int
 main()
 {
 	midi_event_t event;
 	midi_config_t midi_config;
 	int l = -1;
 	unsigned char raw;
 
 	midi_config.device = "/dev/umidi1.0";
 	oss_midi_init(&midi_config);
 
 	while ((l = read(midi_config.fd, &raw, sizeof(raw))) != -1) {
 		if (!(raw & 0x80)) {
 			continue;
 		}
 		event.type = raw & CMD_MASK;
 		event.channel = raw & CHANNEL_MASK;
 		switch (event.type) {
 		case NOTE_ON:
 		case NOTE_OFF:
-		case CONTROLER_ON:
+		case CONTROLLER_ON:
 			if ((l = read(midi_config.fd, &(event.note), sizeof(event.note))) == -1) {
 				perror("Error reading MIDI note");
 				exit(1);
 			}
 			if ((l = read(midi_config.fd, &(event.velocity), sizeof(event.velocity))) == -1) {
 				perror("Error reading MIDI velocity");
 				exit(1);
 			}
 			break;
 		}
 		switch (event.type) {
 		case NOTE_ON:
 		case NOTE_OFF:
 			printf("Channel %d, note %d, velocity %d\n", event.channel, event.note, event.velocity);
 			break;
-		case CONTROLER_ON:
+		case CONTROLLER_ON:
 			printf("Channel %d, controller %d, value %d\n", event.channel, event.controller, event.value);
 			break;
 		default:
 			printf("Unknown event type %d\n", event.type);
 		}
 	}
 	return 0;
 }
diff --git a/share/examples/sound/ossmidi.h b/share/examples/sound/ossmidi.h
index 60bf5e41173e..99a6bacffe73 100644
--- a/share/examples/sound/ossmidi.h
+++ b/share/examples/sound/ossmidi.h
@@ -1,63 +1,63 @@
 /*
  * SPDX-License-Identifier: BSD-2-Clause
  *
  * Copyright (c) 2022 Goran Mekić
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  */
 
 #include <stdlib.h>
 #include <stdio.h>
 #include <fcntl.h>
 
 #define CMD_MASK 0xF0
 #define NOTE_ON 0x90
 #define NOTE_OFF 0x80
 #define CHANNEL_MASK 0xF
-#define CONTROLER_ON 0xB0
+#define CONTROLLER_ON 0xB0
 
 typedef struct midi_event {
 	unsigned char type;
 	unsigned char channel;
 	union {
 		unsigned char note;
 		unsigned controller;
 	};
 	union {
 		unsigned char velocity;
 		unsigned char value;
 	};
 } midi_event_t;
 
 typedef struct midi_config {
 	char   *device;
 	int	fd;
 } midi_config_t;
 
 void
 oss_midi_init(midi_config_t *config)
 {
 	if ((config->fd = open(config->device, O_RDWR)) == -1) {
 		perror("Error opening MIDI device");
 		exit(1);
 	}
 }