diff --git a/Software,-environment-and-sketch-configuration.md b/Software,-environment-and-sketch-configuration.md
index 129a9ff..1be2e8f 100644
--- a/Software,-environment-and-sketch-configuration.md
+++ b/Software,-environment-and-sketch-configuration.md
@@ -9,7 +9,7 @@
 ![alt text](https://raw.githubusercontent.com/sh123/esp32_loraprs/master/images/aprsdroid.png)
 
 # LoRa library configuration
-- Decide if you want to use [arduino-LoRa](https://github.com/espressif/arduino-esp32) or [RadioLib](https://github.com/jgromes/RadioLib) library, you have to use RadioLib library if you are NOT using `SX127x` module, uncomment `USE_RADIOLIB` in sketch if you want to use [RadioLib](https://github.com/jgromes/RadioLib)
+- Decide if you want to use [arduino-LoRa](https://github.com/espressif/arduino-esp32) or [RadioLib](https://github.com/jgromes/RadioLib) library, you have to use RadioLib library if you are NOT using `SX127x` module, uncomment `USE_RADIOLIB` in `loraprs_service.h` if you want to use [RadioLib](https://github.com/jgromes/RadioLib)
   - If you are using RadioLib and not using SX1278 module then modify module declarations in `loraprs_service.cpp` and `loraprs_service.h` find and replace `SX1278` with your module name. Read more about supported modules at [RadioLib Wiki](https://github.com/jgromes/RadioLib/wiki).
 
 # Sketch configuration