diff --git a/src/bluetooth.h b/src/bluetooth.h
index 6e9e5643c..2062754b9 100644
--- a/src/bluetooth.h
+++ b/src/bluetooth.h
@@ -801,6 +801,8 @@ typedef enum {
 #define GATT_SERVER_CHARACTERISTICS_CONFIGURATION   0x2903
 #define GATT_CHARACTERISTIC_PRESENTATION_FORMAT     0x2904
 #define GATT_CHARACTERISTIC_AGGREGATE_FORMAT        0x2905
+#define GATT_CLIENT_SUPPORTED_FEATURES              0x2B29
+#define GATT_SERVER_SUPPORTED_FEATURES              0x2B3A
 
 #define GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NONE          0
 #define GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION  1