diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0223d59fc..f7aff1c21 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -18,6 +18,7 @@ and the versioning aims to respect [Semantic Versioning](http://semver.org/spec/
 - region of relevance (#1791)
 - MMR sector division, EU emission sector division (#1797)
 - German energy balance sector division (#1798)
+- forecasting model calculation (#1799)
 
 ### Removed
 
diff --git a/src/ontology/edits/oeo-model.omn b/src/ontology/edits/oeo-model.omn
index 2539f1bfe..168df5dae 100644
--- a/src/ontology/edits/oeo-model.omn
+++ b/src/ontology/edits/oeo-model.omn
@@ -1684,6 +1684,20 @@ pull request: https://github.com/OpenEnergyPlatform/ontology/pull/1795",
         OEO_00010468
     
     
+Class: OEO_00010470
+
+    Annotations: 
+        <http://purl.obolibrary.org/obo/IAO_0000115> "A forecasting model calculation is a model calculation that produces a forecast."@en,
+        <http://purl.obolibrary.org/obo/IAO_0000118> "forecasting"@en,
+        <http://purl.obolibrary.org/obo/IAO_0000233> "issue: https://github.com/OpenEnergyPlatform/ontology/issues/1691
+pull request: https://github.com/OpenEnergyPlatform/ontology/pull/1799",
+        rdfs:label "forecasting model calculation"@en
+    
+    SubClassOf: 
+        OEO_00000275,
+        OEO_00140094 some OEO_00010411
+    
+    
 Class: OEO_00020011
 
     SubClassOf: