diff --git a/README.md b/README.md
index 314ad42..24f01c8 100644
--- a/README.md
+++ b/README.md
@@ -45,7 +45,7 @@ You can use any IO-pins, but try to avoid pins 0 and 1. They are serial port TX
 
 - `Tools->Port->COMx`
 
-  Arduino IDE shows available COM-ports. In most cases it's biggest numbered COM-port. COM-port number can change when you start to upload program first time (COM-port number can be different after joystick-features are enabled). If this happens, just change COM-port and start upload again. When I tested with RetrOrangePi (Raspbian Linux), port was `/dev/ttyACM0`.
+  Arduino IDE shows available COM-ports. In most cases it's biggest numbered COM-port. COM-port number can change when you start to upload program first time (COM-port number can be different after joystick-features are enabled). If this happens, just change COM-port and start upload again. When I tested with RetrOrangePi (Armbian Linux), port was `/dev/ttyACM0`.
 
 - Test your programming environment and upload