diff --git a/bacnet-stack/ports/linux/main.c b/bacnet-stack/ports/linux/main.c
index fbec158e..f7f99a23 100644
--- a/bacnet-stack/ports/linux/main.c
+++ b/bacnet-stack/ports/linux/main.c
@@ -103,7 +103,6 @@ static void Read_Properties(
         PROP_FIRMWARE_REVISION,
         PROP_APPLICATION_SOFTWARE_VERSION,
         PROP_PROTOCOL_VERSION,
-        PROP_PROTOCOL_CONFORMANCE_CLASS,
         PROP_PROTOCOL_SERVICES_SUPPORTED,
         PROP_PROTOCOL_OBJECT_TYPES_SUPPORTED,
         PROP_MAX_APDU_LENGTH_ACCEPTED,
diff --git a/bacnet-stack/ports/win32/main.c b/bacnet-stack/ports/win32/main.c
index dbd85055..c1e57cfd 100644
--- a/bacnet-stack/ports/win32/main.c
+++ b/bacnet-stack/ports/win32/main.c
@@ -87,7 +87,6 @@ static void Read_Properties(
         PROP_FIRMWARE_REVISION,
         PROP_APPLICATION_SOFTWARE_VERSION,
         PROP_PROTOCOL_VERSION,
-        PROP_PROTOCOL_CONFORMANCE_CLASS,
         PROP_PROTOCOL_SERVICES_SUPPORTED,
         PROP_PROTOCOL_OBJECT_TYPES_SUPPORTED,
         PROP_MAX_APDU_LENGTH_ACCEPTED,