Add const to MIDI pkt pointer arguments

1 files changed, 1 insertions, 1 deletions

diff --git a/src/main.c b/src/main.c
index c6a2a96..c01cb90 100644
--- a/src/main.c
+++ b/src/main.c
@@ -78,7 +78,7 @@
 #include <stdlib.h>
 #include <string.h>
 
-int eusart_write_midi(midi_message_t *pkt)
+int eusart_write_midi(const midi_message_t *pkt)
 {
     size_t length;
     uint8_t *data;