diff --git a/include/led.h b/include/led.h
index 906341a2..02f6d9f9 100644
--- a/include/led.h
+++ b/include/led.h
@@ -41,8 +41,9 @@ typedef enum {
 } led_mode_t;
 
 typedef enum {
-	led_rx = 0, //will also index into array led_state[]
-	led_tx
+	LED_RX = 0, //will also index into array led_state[]
+	LED_TX,
+	LED_MAX
 } led_num_t;
 
 typedef struct {
@@ -68,7 +69,7 @@ typedef struct {
 	uint32_t t_sequence_next;
 	int32_t seq_num_repeat;
 
-	led_state_t led_state[2];
+	led_state_t led_state[LED_MAX];
 } led_data_t;
 
 
diff --git a/src/can_common.c b/src/can_common.c
index 5b0dd13b..311b0431 100644
--- a/src/can_common.c
+++ b/src/can_common.c
@@ -59,7 +59,7 @@ void CAN_SendFrame(USBD_GS_CAN_HandleTypeDef *hcan, can_data_t *channel)
 
 	list_add_tail_locked(&frame_object->list, &hcan->list_to_host);
 
-	led_indicate_trx(&channel->leds, led_tx);
+	led_indicate_trx(&channel->leds, LED_TX);
 }
 
 void CAN_ReceiveFrame(USBD_GS_CAN_HandleTypeDef *hcan, can_data_t *channel)
@@ -97,7 +97,7 @@ void CAN_ReceiveFrame(USBD_GS_CAN_HandleTypeDef *hcan, can_data_t *channel)
 
 	list_add_tail_locked(&frame_object->list, &hcan->list_to_host);
 
-	led_indicate_trx(&channel->leds, led_rx);
+	led_indicate_trx(&channel->leds, LED_RX);
 }
 
 // If there are frames to receive, don't report any error frames. The
diff --git a/src/led.c b/src/led.c
index ff02b13f..63a30b48 100644
--- a/src/led.c
+++ b/src/led.c
@@ -38,12 +38,12 @@ void led_init(
 	void* led_tx_port, uint16_t led_tx_pin, bool led_tx_active_high
 	) {
 	memset(leds, 0, sizeof(led_data_t));
-	leds->led_state[led_rx].port = led_rx_port;
-	leds->led_state[led_rx].pin = led_rx_pin;
-	leds->led_state[led_rx].is_active_high = led_rx_active_high;
-	leds->led_state[led_tx].port = led_tx_port;
-	leds->led_state[led_tx].pin = led_tx_pin;
-	leds->led_state[led_tx].is_active_high = led_tx_active_high;
+	leds->led_state[LED_RX].port = led_rx_port;
+	leds->led_state[LED_RX].pin = led_rx_pin;
+	leds->led_state[LED_RX].is_active_high = led_rx_active_high;
+	leds->led_state[LED_TX].port = led_tx_port;
+	leds->led_state[LED_TX].pin = led_tx_pin;
+	leds->led_state[LED_TX].is_active_high = led_tx_active_high;
 }
 
 void led_set_mode(led_data_t *leds,led_mode_t mode)
@@ -65,8 +65,8 @@ static uint32_t led_set_sequence_step(led_data_t *leds, uint32_t step_num)
 {
 	const led_seq_step_t *step = &leds->sequence[step_num];
 	leds->sequence_step = step_num;
-	led_set(&leds->led_state[led_rx], step->state & 0x01);
-	led_set(&leds->led_state[led_tx], step->state & 0x02);
+	led_set(&leds->led_state[LED_RX], step->state & 0x01);
+	led_set(&leds->led_state[LED_TX], step->state & 0x02);
 	uint32_t delta = 10 * step->time_in_10ms;
 	if (delta > INT32_MAX) {
 		delta = INT32_MAX;  //clamp
@@ -150,13 +150,13 @@ void led_update(led_data_t *leds)
 	switch (leds->mode) {
 
 		case led_mode_off:
-			led_set(&leds->led_state[led_rx], false);
-			led_set(&leds->led_state[led_tx], false);
+			led_set(&leds->led_state[LED_RX], false);
+			led_set(&leds->led_state[LED_TX], false);
 			break;
 
 		case led_mode_normal:
-			led_update_normal_mode(&leds->led_state[led_rx], now);
-			led_update_normal_mode(&leds->led_state[led_tx], now);
+			led_update_normal_mode(&leds->led_state[LED_RX], now);
+			led_update_normal_mode(&leds->led_state[LED_TX], now);
 			break;
 
 		case led_mode_sequence: