diff --git a/ontology/yaml/resources/HVAC/entity_types/ABSTRACT.yaml b/ontology/yaml/resources/HVAC/entity_types/ABSTRACT.yaml
index 581f6ab0fc..a3c713689e 100644
--- a/ontology/yaml/resources/HVAC/entity_types/ABSTRACT.yaml
+++ b/ontology/yaml/resources/HVAC/entity_types/ABSTRACT.yaml
@@ -3645,6 +3645,8 @@ MXVPM:
   guid: "4bb25777-d661-4fd3-9f8f-a84b349ada87"
   description: "Mixing valve percent monitoring."
   is_abstract: true
+  opt_uses:
+  - mixing_valve_percentage_sensor
   uses:
   - mixing_valve_percentage_command
   implements:
diff --git a/ontology/yaml/resources/HVAC/entity_types/HWS.yaml b/ontology/yaml/resources/HVAC/entity_types/HWS.yaml
index fd963c90fd..f9b1f9125a 100644
--- a/ontology/yaml/resources/HVAC/entity_types/HWS.yaml
+++ b/ontology/yaml/resources/HVAC/entity_types/HWS.yaml
@@ -334,6 +334,7 @@ HWS_SWTC_WDPC_WFRM_HWTTC:
   - WFRM
   - HWTTC
 
+
 ###################################
 ### Existing Non-standard Types ###
 ###################################