diff --git a/Makefile b/Makefile
index 53c614a..587bb17 100644
--- a/Makefile
+++ b/Makefile
@@ -64,8 +64,8 @@ ifeq ($(SWITCH_SCREENS),1)
 	CFLAGS += -DSWITCH_SCREENS
 endif
 
-ifeq ($(DISABLE_SLIDER),1)
-	CFLAGS += -DDISABLE_SLIDER
+ifdef FIXED_BRIGHTNESS
+	CFLAGS += -DFIXED_BRIGHTNESS=$(FIXED_BRIGHTNESS)
 endif
 
 ifneq ("$(wildcard $(CURDIR)/../$(DATA)/README.md)","")
diff --git a/source/common/hid.c b/source/common/hid.c
index 02af949..af67123 100644
--- a/source/common/hid.c
+++ b/source/common/hid.c
@@ -24,9 +24,7 @@ u32 InputWait(u32 timeout_sec) {
                 return sd_state ? SD_INSERT : SD_EJECT;
             u8 special_key;
             if ((timer_msec(timer_mcu) >= 64) && (I2C_readRegBuf(I2C_DEV_MCU, 0x10, &special_key, 1))) {
-                #ifndef DISABLE_SLIDER
                 CheckBrightness();
-                #endif
                 if (special_key == 0x01)
                     return pad_state | BUTTON_POWER;
                 else if (special_key == 0x04)
diff --git a/source/common/power.c b/source/common/power.c
index 08ea8fb..65f661a 100644
--- a/source/common/power.c
+++ b/source/common/power.c
@@ -7,9 +7,13 @@ static const u8 br_settings[] = {0x10, 0x17, 0x1E, 0x25, 0x2C, 0x34, 0x3C, 0x44,
 static int prev_brightness = -1;
 void CheckBrightness() {
     u8 curSlider;
+    #ifndef FIXED_BRIGHTNESS
     I2C_readRegBuf(I2C_DEV_MCU, 0x09, &curSlider, 1);
     // Volume Slider value is always between 0x00 and 0x3F
     curSlider >>= 2;
+    #else
+    curSlider = FIXED_BRIGHTNESS;
+    #endif
     if (curSlider != prev_brightness) {
         PXI_DoCMD(PXI_BRIGHTNESS, (u32[]){br_settings[curSlider]}, 1);
         prev_brightness = curSlider;