diff --git a/knx_iot_virtual_pb.c b/knx_iot_virtual_pb.c
index ad68356..1428553 100644
--- a/knx_iot_virtual_pb.c
+++ b/knx_iot_virtual_pb.c
@@ -443,7 +443,7 @@ app_init(void)
 
   /* set the hardware type*/
   //                         123456789012
-  oc_core_set_device_hwt(0, "000000000001");
+  oc_core_set_device_hwt(0, "000000000000");
 
   /* set the model */
   oc_core_set_device_model(0, "KNX virtual - PB");
diff --git a/knx_iot_virtual_sa.c b/knx_iot_virtual_sa.c
index b0b2463..2b1a697 100644
--- a/knx_iot_virtual_sa.c
+++ b/knx_iot_virtual_sa.c
@@ -488,7 +488,7 @@ app_init(void)
   
   /* set the hardware type*/
   //                         123456789012
-  oc_core_set_device_hwt(0, "000000000002");
+  oc_core_set_device_hwt(0, "000000000000");
 
   /* set the model */
   oc_core_set_device_model(0, "KNX virtual - SA");