diff --git a/radio/src/targets/common/arm/stm32/bootloader/boot.cpp b/radio/src/targets/common/arm/stm32/bootloader/boot.cpp
index 762f39253..a0878eb05 100644
--- a/radio/src/targets/common/arm/stm32/bootloader/boot.cpp
+++ b/radio/src/targets/common/arm/stm32/bootloader/boot.cpp
@@ -246,6 +246,7 @@ int main()
   backlightEnable();
 
 #if defined(PCBX7) || defined(PCBXLITE)
+  // we shutdown the bluetooth module now to be sure it will be detected on firmware start
   bluetoothInit(BLUETOOTH_DEFAULT_BAUDRATE, false);
 #endif