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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 4397efb..38e87c4 100644
--- a/cores/arduino/HardwareSerial.cpp
+++ b/cores/arduino/HardwareSerial.cpp
@@ -191,7 +191,7 @@ HardwareSerial::HardwareSerial(ring_buffer *rx_buffer,
// Public Methods //////////////////////////////////////////////////////////////
-void HardwareSerial::begin(long baud)
+void HardwareSerial::begin(unsigned long baud)
{
uint16_t baud_setting;
bool use_u2x = true;