diff --git a/bootloader/mpio_hd200_hd300.c b/bootloader/mpio_hd200_hd300.c
index 3d821caf6b..6538c06a31 100644
--- a/bootloader/mpio_hd200_hd300.c
+++ b/bootloader/mpio_hd200_hd300.c
@@ -390,9 +390,9 @@ void main(void)
         if ( hold != last_hold )
         {
             if ( hold )
-                _backlight_hw_off();
+                backlight_hw_off();
             else
-                _backlight_hw_on();
+                backlight_hw_on();
 
             last_hold = hold;
         }
diff --git a/firmware/target/arm/pbell/vibe500/backlight-target.h b/firmware/target/arm/pbell/vibe500/backlight-target.h
index f924d01de8..7168ed62fa 100644
--- a/firmware/target/arm/pbell/vibe500/backlight-target.h
+++ b/firmware/target/arm/pbell/vibe500/backlight-target.h
@@ -32,7 +32,7 @@ void backlight_hw_brightness(int brightness);
 #ifdef HAVE_BUTTON_LIGHT
 void buttonlight_hw_on(void);
 void buttonlight_hw_off(void);
-void buttonlight_hw_set_brightness(int brightness);
+void buttonlight_hw_brightness(int brightness);
 #endif
 
 #endif /* BACKLIGHT_TARGET.H */
diff --git a/uisimulator/common/backlight-sim.h b/uisimulator/common/backlight-sim.h
index cd77d0287b..cbb100b645 100644
--- a/uisimulator/common/backlight-sim.h
+++ b/uisimulator/common/backlight-sim.h
@@ -35,7 +35,7 @@ void backlight_hw_brightness(int val);
 void buttonlight_hw_on(void);
 void buttonlight_hw_off(void);
 #ifdef HAVE_BUTTONLIGHT_BRIGHTNESS
-void buttonlight_hw_set_brightness(int val);
+void buttonlight_hw_brightness(int val);
 #endif /* HAVE_BUTTONLIGHT_BRIGHTNESS */
 #endif /* HAVE_BUTTON_LIGHT */