diff --git a/BoardConfig.mk b/BoardConfig.mk
index 2e199bf..b82d78a 100644
--- a/BoardConfig.mk
+++ b/BoardConfig.mk
@@ -35,6 +35,7 @@ BOARD_SUPER_PARTITION_SIZE := 6710886400
 
 # Properties
 TARGET_PRODUCT_PROP += $(DEVICE_PATH)/product.prop
+TARGET_SYSTEM_EXT_PROP += $(DEVICE_PATH)/system_ext.prop
 TARGET_VENDOR_PROP += $(DEVICE_PATH)/vendor.prop
 
 # Recovery
diff --git a/system_ext.prop b/system_ext.prop
new file mode 100644
index 0000000..78d29e6
--- /dev/null
+++ b/system_ext.prop
@@ -0,0 +1,2 @@
+# Display
+sys.brightness.disable_gamma_conversion=true