diff --git a/src/main.cpp b/src/main.cpp
index 0eae30a..e3a6da1 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -2,7 +2,7 @@
 // curl -XPOST --data-binary @- -H 'Content-Type:text/plain'
 // http://esp32oled.local/oled
 
-// I connected SCK to D22 and SDA to D21
+// I connected SCL to D22 and SDA to D21
 
 #include <Adafruit_GFX.h>
 #include <Adafruit_I2CDevice.h>