diff --git a/src/ontology/edits/oeo-physical.omn b/src/ontology/edits/oeo-physical.omn
index cba241f60..4791142b8 100644
--- a/src/ontology/edits/oeo-physical.omn
+++ b/src/ontology/edits/oeo-physical.omn
@@ -11928,6 +11928,22 @@ pull request: https://github.com/OpenEnergyPlatform/ontology/pull/2262"
         <http://purl.obolibrary.org/obo/BFO_0000051> some OEO_00020500
     
     
+Class: OEO_00020512
+
+    Annotations: 
+        <http://purl.obolibrary.org/obo/IAO_0000115> "Liquid hydrogen is hydrogen that has been brought to a liquid state of matter at -253°C.",
+        rdfs:label "liquid hydrogen"@en,
+        OEO_00020426 "issue: https://github.com/OpenEnergyPlatform/ontology/issues/2274
+pull request: https://github.com/OpenEnergyPlatform/ontology/pull/2222"
+    
+    EquivalentTo: 
+        OEO_00000220
+         and (OEO_00000531 value OEO_00000256)
+    
+    SubClassOf: 
+        OEO_00000220
+    
+    
 Class: OEO_00030000
 
     Annotations: