diff --git a/src/rdf-mappings/initial_ontology_definitions.py b/src/rdf-mappings/initial_ontology_definitions.py
index d6cc59f4ffcfbbac9f01706ecb601a1a1203e6f2..7bf136efa3e0350e145d8e272aad9cc126cc23f7 100644
--- a/src/rdf-mappings/initial_ontology_definitions.py
+++ b/src/rdf-mappings/initial_ontology_definitions.py
@@ -143,7 +143,7 @@ def create_initial_classes_and_properties_arm_items(g, dho_n):
     g.add((dho_n.coatOfArmsPresentedAs, RDF.type, OWL.ObjectProperty))
     g.add((dho_n.textHasTranscription, RDF.type, OWL.ObjectProperty))
 
-def create_initial_instances_arm_items(g, dho_n, dho_data_n):
+def create_initial_instances_arm_items(g, dho_data_n):
     """
     Helper function for the module `map-tblArmItems.py`. Creates instances, representing necessary metadata of the knowledge graph, before
     any data is added to the Knowledge Graph by `map-tblArmItems.py`.