diff --git a/bacnet-stack/ports/atmega168/apdu.c b/bacnet-stack/ports/atmega168/apdu.c
index 21044482..b03e1115 100644
--- a/bacnet-stack/ports/atmega168/apdu.c
+++ b/bacnet-stack/ports/atmega168/apdu.c
@@ -48,9 +48,11 @@ bool apdu_service_supported(BACNET_SERVICES_SUPPORTED service_supported)
     if (service_supported == SERVICE_SUPPORTED_READ_PROPERTY) {
         status = true;
     }
+#if 0
     if (service_supported == SERVICE_SUPPORTED_WRITE_PROPERTY) {
         status = true;
     }
+#endif
 
     return status;
 }
@@ -102,10 +104,14 @@ void apdu_handler(BACNET_ADDRESS * src, uint8_t * apdu, /* APDU data */
             if (service_choice == SERVICE_CONFIRMED_READ_PROPERTY) {
                 handler_read_property(service_request,
                     service_request_len, src, &service_data);
-            } else if (service_choice == SERVICE_CONFIRMED_WRITE_PROPERTY) {
+            }
+#if 0            
+            else if (service_choice == SERVICE_CONFIRMED_WRITE_PROPERTY) {
                 handler_write_property(service_request,
                     service_request_len, src, &service_data);
-            } else {
+            } 
+#endif
+            else {
                 handler_unrecognized_service(service_request,
                     service_request_len, src, &service_data);
             }