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-rw-r--r--cores/arduino/HardwareSerial_private.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/cores/arduino/HardwareSerial_private.h b/cores/arduino/HardwareSerial_private.h
index fa20e55..ea41028 100644
--- a/cores/arduino/HardwareSerial_private.h
+++ b/cores/arduino/HardwareSerial_private.h
@@ -99,7 +99,7 @@ void HardwareSerial::_rx_complete_irq(void)
// No Parity error, read byte and store it in the buffer if there is
// room
unsigned char c = *_udr;
- uint8_t i = (unsigned int)(_rx_buffer_head + 1) % SERIAL_BUFFER_SIZE;
+ rx_buffer_index_t i = (unsigned int)(_rx_buffer_head + 1) % SERIAL_RX_BUFFER_SIZE;
// if we should be storing the received character into the location
// just before the tail (meaning that the head would advance to the