diff --git a/bacnet-stack/demo/object/ao.c b/bacnet-stack/demo/object/ao.c
index 93e13e48..0ba68cd1 100644
--- a/bacnet-stack/demo/object/ao.c
+++ b/bacnet-stack/demo/object/ao.c
@@ -75,7 +75,6 @@ static const int Properties_Required[] = {
 };
 
 static const int Properties_Optional[] = {
-    PROP_DESCRIPTION,
     -1
 };