diff --git a/application.c b/application.c
index 729f6cb..fe5be39 100644
--- a/application.c
+++ b/application.c
@@ -257,7 +257,7 @@ static void command_voltages(void* argument)
 	float* voltages;
 	print_target(); // print target voltage (also sets measurement conditions)
 	puts("signal voltages:\n");
-	for (uint8_t i = channel_start; i < channel_stop; i++) {
+	for (uint8_t i = channel_start; i <= channel_stop; i++) {
 		puts("- ");
 		puts(channel_names[i]);
 		mux_select(i); // select the channel
@@ -284,7 +284,7 @@ static void command_types(void* argument)
 	gpio_set(GPIO_PORT(SIGNAL_PU_PIN), GPIO_PIN(SIGNAL_PU_PIN)); // ensure pull-up is not active
 	gpio_set(GPIO_PORT(TARGET_EN), GPIO_PIN(TARGET_EN)); // ensure the level shifters pulling up the signals are not enabled
 
-	for (uint8_t i = channel_start; i < channel_stop; i++) {
+	for (uint8_t i = channel_start; i <= channel_stop; i++) {
 		puts(channel_names[i]);
 		puts("     ");
 		mux_select(i); // select the channel
@@ -354,7 +354,7 @@ static void command_channel_start(void* argument)
 {
 	if (argument) {
 		const uint32_t channel = *(uint32_t*)argument;
-		if (channel < CHANNEL_NUMBERS && channel < channel_start) {
+		if (channel < CHANNEL_NUMBERS && channel < channel_stop) {
 			channel_start = channel;
 		}
 	}