diff --git a/docs/Compiling_STM32.md b/docs/Compiling_STM32.md
index 5a09899..4884904 100644
--- a/docs/Compiling_STM32.md
+++ b/docs/Compiling_STM32.md
@@ -90,7 +90,7 @@ See below my module for reference
 This method use USB connector on the STM32 V1.0 board or on the maple clone board.  
 
 1. Install first maple USB driver by running the batch file found in Arduino STM32 package folder "..\hardware\Arduino_STM32\drivers\win\install_drivers.bat"  
-1. Download the free STM32 flash loader demonstrator from [ST.com](http://www.st.com/en/development-tools/flasher-stm32.html) and using a USB-TTL device (like FTDI cable) flash the STM32duino bootloader available from Roger Clark's great STM32 site [here](https://github.com/rogerclarkmelbourne/STM32duino-bootloader/tree/master/STM32F1/binaries) .Use bootloader **generic_boot20_pc13.bin**
+1. Download the free STM32 flash loader demonstrator from [ST.com](http://www.st.com/en/development-tools/flasher-stm32.html) and using a USB-TTL device (like FTDI cable) flash the STM32duino bootloader available from Roger Clark's great STM32 site [here](https://github.com/rogerclarkmelbourne/STM32duino-bootloader/tree/master/STM32F1/binaries) .Use bootloader **generic_boot20_pa1.bin**
 1. Open Arduino IDE,browse to multiprotocol folder,load the sketch multiprotocol.ino.
 1. In Arduino IDE under "Upload method" select **STM32duino**-bootloader.Wait until upload is complete.