diff --git a/README.md b/README.md
index 01e1b16..3fe34bb 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,7 @@ GND      <-> PWM breakout board GND
 D9       <-> PWM Pin of the breakout board
 
 A4       <-> SDA pin of BMP280 breakout board
-A5       <-> SDA pin of BMP280 breakout board
+A5       <-> SCL pin of BMP280 breakout board
 
 PWM board load <-> PC fan (+)
 PWM board GNC  <-> PC fan (-)