diff --git a/BoardConfig.mk b/BoardConfig.mk
index 5e726fa..07e999d 100644
--- a/BoardConfig.mk
+++ b/BoardConfig.mk
@@ -126,6 +126,7 @@ TARGET_TAP_TO_WAKE_NODE := "/sys/touchpanel/double_tap"
 
 # Properties
 TARGET_SYSTEM_PROP += $(DEVICE_PATH)/system.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..8417559
--- /dev/null
+++ b/system_ext.prop
@@ -0,0 +1,2 @@
+# Bluetooth
+bluetooth.device.class_of_device=90,2,12