diff --git a/firmware/backlight.c b/firmware/backlight.c
index 8568c98829..1aef613ae1 100644
--- a/firmware/backlight.c
+++ b/firmware/backlight.c
@@ -656,6 +656,7 @@ bool is_remote_backlight_on(void) {return true;}
 
 #ifdef HAVE_BACKLIGHT_BRIGHTNESS
 #if defined(IRIVER_H300_SERIES) || defined(IAUDIO_X5)
+#ifndef SIMULATOR
 void backlight_set_brightness(int val)
 {
     /* set H300 brightness by changing the PWM
@@ -681,4 +682,5 @@ void backlight_set_brightness(int val)
 }
 #endif
 #endif
+#endif