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-rw-r--r--src/avr/main.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/avr/main.c b/src/avr/main.c
index 2655d307..57aa3c01 100644
--- a/src/avr/main.c
+++ b/src/avr/main.c
@@ -54,7 +54,7 @@ DECL_INIT(prescaler_init);
// Optimized crc16_ccitt for the avr processor
uint16_t
-crc16_ccitt(char *buf, uint8_t len)
+crc16_ccitt(uint8_t *buf, uint_fast8_t len)
{
uint16_t crc = 0xFFFF;
while (len--)