diff --git a/radio/src/targets/common/arm/stm32/bootloader/boot.cpp b/radio/src/targets/common/arm/stm32/bootloader/boot.cpp
index 0e7dec195..90010c956 100644
--- a/radio/src/targets/common/arm/stm32/bootloader/boot.cpp
+++ b/radio/src/targets/common/arm/stm32/bootloader/boot.cpp
@@ -244,6 +244,7 @@ int main()
 
   lcdInit();
   backlightInit();
+  backlightEnable();
 
 #if defined(PCBTARANIS)
   i2cInit();
diff --git a/radio/src/targets/horus/board.h b/radio/src/targets/horus/board.h
index 62b5b7004..d707a77a7 100644
--- a/radio/src/targets/horus/board.h
+++ b/radio/src/targets/horus/board.h
@@ -498,8 +498,8 @@ void lcdSetContrast();
 #define lcdRefreshWait(...)
 
 // Backlight driver
-void backlightInit(void);
-#if defined(SIMU)
+void backlightInit();
+#if defined(SIMU) || !defined(__cplusplus)
 #define backlightEnable(...)
 #else
 void backlightEnable(uint8_t dutyCycle);
diff --git a/radio/src/targets/taranis/board.h b/radio/src/targets/taranis/board.h
index f50030bca..4dbb4d85a 100644
--- a/radio/src/targets/taranis/board.h
+++ b/radio/src/targets/taranis/board.h
@@ -625,11 +625,13 @@ void backlightInit();
 void backlightDisable();
 #define BACKLIGHT_DISABLE()             backlightDisable()
 uint8_t isBacklightEnabled();
-#if defined(PCBX9E) || defined(PCBX9DP)
-  void backlightEnable(uint8_t level, uint8_t color);
+#if !defined(__cplusplus)
+  #define backlightEnable(...)
+#elif defined(PCBX9E) || defined(PCBX9DP)
+  void backlightEnable(uint8_t level = 0, uint8_t color = 0);
   #define BACKLIGHT_ENABLE()            backlightEnable(g_eeGeneral.backlightBright, g_eeGeneral.backlightColor)
 #else
-  void backlightEnable(uint8_t level);
+  void backlightEnable(uint8_t level = 0);
   #define BACKLIGHT_ENABLE()            backlightEnable(g_eeGeneral.backlightBright)
 #endif