1 files changed, 1 insertions, 1 deletions

diff --git a/src/mailbox.h b/src/mailbox.h
index 2104265..dbd7be0 100644
--- a/src/mailbox.h
+++ b/src/mailbox.h
@@ -66,5 +66,5 @@ typedef struct __attribute__((aligned(MAIL_ALIGN))) Mail {
 
 void        mbox_init();
 const Mail* mbox_read(uint8_t channel);
-void        mbox_write(uint8_t channel, volatile const void* mail);
+uint32_t    mbox_write(uint8_t channel, volatile const void* mail);