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-rw-r--r--cores/arduino/HardwareSerial.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/cores/arduino/HardwareSerial.cpp b/cores/arduino/HardwareSerial.cpp
index 641c973..d6be218 100644
--- a/cores/arduino/HardwareSerial.cpp
+++ b/cores/arduino/HardwareSerial.cpp
@@ -352,7 +352,7 @@ void HardwareSerial::flush()
;
}
-ssize_t HardwareSerial::write(uint8_t c)
+size_t HardwareSerial::write(uint8_t c)
{
int i = (_tx_buffer->head + 1) % SERIAL_BUFFER_SIZE;