diff --git a/CHANGELOG.md b/CHANGELOG.md
index b71856b9..da0b8e45 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,6 +15,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - Properly report compile errors in GitHub Actions (#296)
 - Put build artifacts in a separate directory to reduce clutter.
 - Change 266 files from CRLF to LF.
+- Add `_BV()` macro.
 - Replace `#define yield() _NOP()` with `inline void yield() { _NOP(); }` so that other code can define a `yield()` function.
 - Update .gitattributes so we have consistent line endings
 - Run tests on push as well as on a pull request so developers can see impact
diff --git a/cpp/arduino/Arduino.h b/cpp/arduino/Arduino.h
index 7061023a..b301ec21 100644
--- a/cpp/arduino/Arduino.h
+++ b/cpp/arduino/Arduino.h
@@ -50,10 +50,7 @@ inline void noInterrupts() { _NOP(); }
 
 typedef unsigned int word;
 
-#define bit(b) (1UL << (b))
-
-
-
+#define _BV(bit) (1 << (bit))
 
 // Get the bit location within the hardware port of the given virtual pin.
 // This comes from the pins_*.c file for the active board configuration.