diff --git a/bacnet-stack/include/bacdef.h b/bacnet-stack/include/bacdef.h
index 929a1830..e41b8956 100644
--- a/bacnet-stack/include/bacdef.h
+++ b/bacnet-stack/include/bacdef.h
@@ -90,4 +90,7 @@ typedef struct BACnet_Object_Id {
 #define MAX_NPDU (1+1+2+1+MAX_MAC_LEN+2+1+MAX_MAC_LEN+1+1+2)
 #define MAX_PDU (MAX_APDU + MAX_NPDU)
 
+#define BACNET_ID_VALUE(bacnet_object_instance, bacnet_object_type) ((((bacnet_object_type) & BACNET_MAX_OBJECT) << BACNET_INSTANCE_BITS) | ((bacnet_object_instance) & BACNET_MAX_INSTANCE))
+#define BACNET_INSTANCE(bacnet_object_id_num) ((bacnet_object_id_num)&BACNET_MAX_INSTANCE)
+#define BACNET_TYPE(bacnet_object_id_num) (((bacnet_object_id_num) >> BACNET_INSTANCE_BITS ) & BACNET_MAX_OBJECT)
 #endif
diff --git a/bacnet-stack/include/bacenum.h b/bacnet-stack/include/bacenum.h
index 165a55fa..54122591 100644
--- a/bacnet-stack/include/bacenum.h
+++ b/bacnet-stack/include/bacenum.h
@@ -385,7 +385,6 @@ typedef enum {
 /* do the MAX as define rather than enumeration for devices
    and compilers that want to use smaller datatype for enum */
 #define MAX_BACNET_PROPERTY_ID 4194303
-#define MAX_BACNET_OBJECT_ID (0x3FFFFFU)
 typedef enum {
     ACTION_DIRECT = 0,
     ACTION_REVERSE = 1