diff --git a/include/hardware/vehicle.h b/include/hardware/vehicle.h
index bd623ab..a0bc1fe 100644
--- a/include/hardware/vehicle.h
+++ b/include/hardware/vehicle.h
@@ -279,10 +279,12 @@
 /*
  * Bit flags for fan direction
  */
-enum vehicle_hvac_fan_direction_flags {
-    VEHICLE_HVAC_FAN_DIRECTION_FACE_FLAG            = 0x1,
-    VEHICLE_HVAC_FAN_DIRECTION_FLOOR_FLAG           = 0x2,
-    VEHICLE_HVAC_FAN_DIRECTION_FACE_AND_FLOOR_FLAG  = 0x3
+enum vehicle_hvac_fan_direction {
+    VEHICLE_HVAC_FAN_DIRECTION_FACE                 = 0x1,
+    VEHICLE_HVAC_FAN_DIRECTION_FLOOR                = 0x2,
+    VEHICLE_HVAC_FAN_DIRECTION_FACE_AND_FLOOR       = 0x3,
+    VEHICLE_HVAC_FAN_DIRECTION_DEFROST              = 0x4,
+    VEHICLE_HVAC_FAN_DIRECTION_DEFROST_AND_FLOOR    = 0x5
 };
 
 /**