diff --git a/api/HardwareCAN.h b/api/HardwareCAN.h
index 57d9d582..f3b9edfa 100644
--- a/api/HardwareCAN.h
+++ b/api/HardwareCAN.h
@@ -39,6 +39,13 @@ enum class CanBitRate : int
   BR_1000k = 1000000,
 };
 
+/**************************************************************************************
+ * CONSTANTS
+ **************************************************************************************/
+
+static int constexpr CAN_SUCCESS       =  1;
+static int constexpr CAN_ERROR_GENERIC = -1;
+
 /**************************************************************************************
  * NAMESPACE
  **************************************************************************************/