diff --git a/driver/backlight.c b/driver/backlight.c
index f3c3006..79ed050 100644
--- a/driver/backlight.c
+++ b/driver/backlight.c
@@ -28,7 +28,9 @@ bool backlightOn;
 void BACKLIGHT_InitHardware()
 {
 	// 48MHz / 94 / 1024 ~ 500Hz
-	const uint32_t PWM_FREQUENCY_HZ =  1000;
+	// kamilsss655: needs to be higher than audible frequency otherwise it will
+	// be heard on the receiving radio if the screen is dimmed during tx
+	const uint32_t PWM_FREQUENCY_HZ =  6000;
 	PWM_PLUS0_CLKSRC |= ((48000000 / 1024 / PWM_FREQUENCY_HZ) << 16);
 	PWM_PLUS0_PERIOD = 1023;